[docs ]: documentation for first time contributors

[that-ar-guy]

closes : #3099

PR Summary

This pull request introduces a new guide for contributing to documentation and updates the navigation structure to include this guide. The most important changes include the addition of a comprehensive "Getting Started with Documentation" guide and the corresponding update to the mkdocs.yml file.

Documentation improvements:

• docs/license-contributing/getting-started-with-documentation.md: Added a new guide to help contributors understand how to update and improve the documentation, including general documentation and rule-specific documentation. This guide covers prerequisites, locating documentation files, updating documentation, and best practices for writing documentation.

Navigation structure update:

• mkdocs.yml: Updated the navigation structure to include the new "Getting Started with Documentation" guide under the "License and contributing" section.

PR Checklist

• PR has a meaningful title
• Summarized changes
• Change is not breaking
• This PR is ready to merge and is not Work in Progress
• Rule changes
  • Unit tests created/ updated
  • Rule documentation created/ updated
  • Link to a filed issue
  • Change log has been updated with change under unreleased section
• Other code changes
  • Unit tests created/ updated
  • Link to a filed issue
  • Change log has been updated with change under unreleased section