refactor(docs): move from reST to Markdown (reanahub#428)

Convert docs from reStructuredText to Markdown so that the changelog
file is compatible with Release Please.

AUTHORS.md

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+# Authors
+
+The list of contributors in alphabetical order:
+
+- [Adelina Lintuluoto](https://orcid.org/0000-0002-0726-1452)
+- [Agisilaos Kounelis](https://orcid.org/0000-0001-9312-3189)
+- [Anton Khodak](https://orcid.org/0000-0003-3263-4553)
+- [Diego Rodriguez](https://orcid.org/0000-0003-0649-2002)
+- [Dinos Kousidis](https://orcid.org/0000-0002-4914-4289)
+- [Jan Okraska](https://orcid.org/0000-0002-1416-3244)
+- [Marco Donadoni](https://orcid.org/0000-0003-2922-5505)
+- [Rokas Maciulaitis](https://orcid.org/0000-0003-1064-6967)
+- [Sinclert Perez](https://www.linkedin.com/in/sinclert)
+- [Tibor Simko](https://orcid.org/0000-0001-7202-5803)

CHANGELOG.md

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+# Changelog
+
+## 0.9.2 (2023-12-12)
+
+- Adds metadata labels to Dockerfile.
+- Adds automated multi-platform container image building for amd64 and arm64 architectures.
+- Changes CVMFS support to allow users to automatically mount any available repository.
+- Fixes container image building on the arm64 architecture.
+- Fixes the creation of Kubernetes jobs by retrying in case of error and by correctly handling the error after reaching the retry limit.
+- Fixes job monitoring in cases when job creation fails, for example when it is not possible to successfully mount volumes.
+
+## 0.9.1 (2023-09-27)
+
+- Adds unique error messages to Kubernetes job monitor to more easily identify source of problems.
+- Changes Paramiko to version 3.0.0.
+- Changes HTCondor to version 9.0.17 (LTS).
+- Changes Rucio authentication helper to version 1.1.1 allowing users to override the Rucio server and authentication hosts independently of VO name.
+- Fixes intermittent Slurm connection issues by DNS-resolving the Slurm head node IPv4 address before establishing connections.
+- Fixes deletion of failed jobs not being performed when Kerberos is enabled.
+- Fixes job monitoring to consider OOM-killed jobs as failed.
+- Fixes Slurm command generation issues when using fully-qualified image names.
+- Fixes location of HTCondor build dependencies.
+- Fixes detection of default Rucio server and authentication host for ATLAS VO.
+- Fixes container image names to be Podman-compatible.
+
+## 0.9.0 (2023-01-20)
+
+- Adds support for Rucio authentication for workflow jobs.
+- Adds support for specifying `slurm_partition` and `slurm_time` for Slurm compute backend jobs.
+- Adds Kerberos sidecar container to renew ticket periodically for long-running jobs.
+- Changes `reana-auth-vomsproxy` sidecar to the latest stable version to support client-side proxy file generation technique and ESCAPE VOMS.
+- Changes default Slurm partition to `inf-short`.
+- Changes to PostgreSQL 12.13.
+- Changes the base image of the component to Ubuntu 20.04 LTS and reduces final Docker image size by removing build-time dependencies.
+
+## 0.8.1 (2022-02-07)
+
+- Adds support for specifying `kubernetes_job_timeout` for Kubernetes compute backend jobs.
+- Adds a new condition to allow processing jobs in case of receiving multiple failed events when job containers are not in a running state.
+
+## 0.8.0 (2021-11-22)
+
+- Adds database connection closure after each REST API request.
+- Adds labels to job and run-batch pods to reduce k8s events to listen to for `job-monitor`.
+- Fixes auto-mounting of Kubernetes API token inside user jobs by disabling it.
+- Changes job dispatching to use only job-specific node labels.
+- Changes to PostgreSQL 12.8.
+
+## 0.7.5 (2021-07-05)
+
+- Changes HTCondor to 8.9.11.
+- Changes myschedd package and configuration to latest versions.
+- Fixes job command formatting bug for CWL workflows on HTCondor.
+
+## 0.7.4 (2021-04-28)
+
+- Adds configuration environment variable to set job memory limits for the Kubernetes compute backend (`REANA_KUBERNETES_JOBS_MEMORY_LIMIT`).
+- Fixes Kubernetes job log capture to include information about failures caused by external factors such as OOMKilled.
+- Adds support for specifying `kubernetes_memory_limit` for Kubernetes compute backend jobs.
+
+## 0.7.3 (2021-03-17)
+
+- Adds new configuration to toggle Kubernetes user jobs clean up.
+- Fixes HTCondor Docker networking and machine version requirement setup.
+- Fixes HTCondor logs and workspace files retrieval on job failure.
+- Fixes Slurm job submission providing the correct shell environment to run Singularity.
+- Changes HTCondor myschedd to the latest version.
+- Changes job status `succeeded` to `finished` to use central REANA nomenclature.
+- Changes how to deserialise job commands using central REANA-Commons deserialiser function.
+
+## 0.7.2 (2021-02-03)
+
+- Fixes minor code warnings.
+- Changes CI system to include Python flake8 and Dockerfile hadolint checkers.
+
+## 0.7.1 (2020-11-10)
+
+- Adds support for specifying `htcondor_max_runtime` and `htcondor_accounting_group` for HTCondor compute backend jobs.
+- Fixes Docker build by properly exiting when there are problems with `myschedd` installation.
+
+## 0.7.0 (2020-10-20)
+
+- Adds support for running unpacked Docker images from CVMFS on HTCondor jobs.
+- Adds support for pulling private images using image pull secrets.
+- Adds support for VOMS proxy as a new authentication method.
+- Adds pinning of all Python dependencies allowing to easily rebuild component images at later times.
+- Fixes HTCondor job submission retry technique.
+- Changes error reporting on Docker image related failures.
+- Changes runtime pods to prefix user workflows with the configured REANA prefix.
+- Changes CVMFS to be read-only mount.
+- Changes runtime job instantiation into the configured runtime namespace.
+- Changes test suite to enable running tests locally also on macOS platform.
+- Changes CERN HTCondor compute backend to use the new `myschedd` connection library.
+- Changes CERN Slurm compute backend to improve job status detection.
+- Changes base image to use Python 3.8.
+- Changes code formatting to respect `black` coding style.
+- Changes documentation to single-page layout.
+
+## 0.6.1 (2020-05-25)
+
+- Upgrades REANA-Commons package using latest Kubernetes Python client version.
+
+## 0.6.0 (2019-12-20)
+
+- Adds generic job manager class and provides example classes for CERN HTCondor
+  and CERN Slurm clusters.
+- Moves job controller to the same Kubernetes pod with the
+  REANA-Workflow-Engine-\* (sidecar pattern).
+- Adds sidecar container to the Kubernetes job pod if Kerberos authentication
+  is required.
+- Provides user secrets to the job container runtime tasks.
+- Refactors job monitoring using singleton pattern.
+
+## 0.5.1 (2019-04-23)
+
+- Pins `urllib3` due to a conflict while installing `Kubernetes` Python
+  library.
+- Fixes documenation build badge.
+
+## 0.5.0 (2019-04-23)
+
+- Adds a new endpoint to delete jobs (Kubernetes).
+- Introduces new common interface for job management which defines what the
+  compute backends should offer to be compatible with REANA, currently only
+  Kubernetes backend is supported.
+- Fixes security vulnerability which allowed users to access other people's
+  workspaces.
+- Makes CVMFS mounts optional and configurable at repository level.
+- Updates the creation of CVMFS volumes specification, it now uses normal
+  persistent volume claims.
+- Increases stability and improves test coverage.
+
+## 0.4.0 (2018-11-06)
+
+- Improves REST API documentation rendering.
+- Changes license to MIT.
+
+## 0.3.2 (2018-09-26)
+
+- Adapts Kubernetes API adaptor to mount shared volumes on jobs as CEPH
+  `persistentVolumeClaim`'s (managed by `reana-cluster`) instead of plain
+  CEPH volumes.
+
+## 0.3.1 (2018-09-07)
+
+- Pins REANA-Commons and REANA-DB dependencies.
+
+## 0.3.0 (2018-08-10)
+
+- Adds uwsgi for production deployments.
+- Switches from pykube to official Kubernetes python client.
+- Adds compatibility with latest Kubernetes.
+
+## 0.2.0 (2018-04-19)
+
+- Adds dockerignore file to ease developments.
+
+## 0.1.0 (2018-01-30)
+
+- Initial public release.
+