Update the release utilities to the current processes

[Desvelao]

Description

The current release processes have changed, and we need to update the internal utilities that manage some of them and remove the deprecated ones.

The current scripts/tags.py file used to create the tags doesn't adapt to the current release process. We want to split it into two processes and let the values can be defined using parameters instead of hardcoded values that force us to commit and push the changes to the remote.

We want to separate the process to:

• Bump: bump the plugin version. The script should accept parameters to define the version.
• Tag: create the target tags. The script should accept the revision and tag_suffix parameters.

Tasks

• Remove stage and commit properties from the package.json
• Separate the current scripts/tags.py
  • bump
  • tags

[Desvelao]

Changes

• Create bump script
• Port tag.py to NodeJS. Allow to define the input from stdin
• Remove tag.py
• Add package scripts
• Remove stage and commit properties form the package manifest
• Add RELEASING.md file