Pre commit

[gvegayon]

This pull request introduces a new pre-commit workflow, configures pre-commit hooks, and cleans up some unnecessary whitespace in various files. The most important changes include adding a pre-commit workflow, configuring pre-commit hooks, and removing trailing whitespace from several files.

New Workflow and Configuration:

• .github/workflows/pre-commit.yaml: Added a new pre-commit workflow that runs on push and pull request events for the main branch. This workflow sets up Python and runs pre-commit hooks.
• .pre-commit-config.yaml: Configured pre-commit hooks to check for trailing whitespace, end-of-file fixes, YAML validation, large files, and private keys. Also included hooks for styling files and rendering README RMarkdown files.

Code Cleanup:

• .github/workflows/coverage.yaml: Removed unnecessary trailing whitespace.
• .github/workflows/r.yml: Removed unnecessary trailing whitespace.
• Makefile: Removed unnecessary trailing whitespace.
• R/ModelDiffNet.R: Removed unnecessary trailing whitespace.
• R/ModelSIR.R: Removed unnecessary trailing whitespace.
• R/ModelSIRD.R: Removed unnecessary trailing whitespace.

[codecov]

Codecov Report

Attention: Patch coverage is 14.58333% with 82 lines in your changes missing coverage. Please review.

Project coverage is 19.14%. Comparing base (8bd6b18) to head (e241581).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
R/data.R	0.00%	21 Missing ⚠️
R/plot_epi.R	0.00%	15 Missing ⚠️
R/virus.R	0.00%	6 Missing ⚠️
R/ModelSURV.R	0.00%	5 Missing ⚠️
R/ModelSEIRDCONN.R	0.00%	4 Missing ⚠️
R/ModelSIRDCONN.R	0.00%	3 Missing ⚠️
R/make_saver.R	62.50%	3 Missing ⚠️
R/tool.R	0.00%	3 Missing ⚠️
src/model.cpp	0.00%	3 Missing ⚠️
R/ModelSIRMixing.R	0.00%	2 Missing ⚠️
... and 16 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #22      +/-   ##
==========================================
- Coverage   19.54%   19.14%   -0.40%     
==========================================
  Files          34       34              
  Lines        1740     1776      +36     
==========================================
  Hits          340      340              
- Misses       1400     1436      +36     

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