Docs

[DanielGarbozo]

This pull request sets up documentation building and hosting with MkDocs and Read the Docs, and improves the maintainability and usability of the documentation. The main changes include adding configuration files for Read the Docs and MkDocs, updating documentation dependencies, and refactoring internal links for better compatibility with the documentation site.

Documentation build and hosting setup:

• Added .readthedocs.yaml to configure Read the Docs builds, specifying the OS, Python version, and requirements file for building the docs (.readthedocs.yaml).
• Added mkdocs.yml to configure the MkDocs documentation site, including theme, navigation, plugins, and repository links (mkdocs.yml).
• Added docs/requirements.txt to specify documentation build dependencies (mkdocs-material, mkdocs-include-markdown-plugin) (docs/requirements.txt).

Documentation content improvements:

• Created docs/index.md to reuse the repository README.md as the documentation homepage, ensuring a single source of truth (docs/index.md).
• Updated all documentation files to use [Back to README](index.md) for internal navigation instead of relative paths, improving compatibility with the MkDocs site (multiple files). [1] [2] [3] [4] [5] [6] [7] [8] [9]

Link and navigation fixes:

• Updated links to the validation format documentation in README.md and docs/testing.md to point to the GitHub location, ensuring they work from both the docs site and repository (README.md, docs/testing.md). [1] [2]