Documentation hosting on Github Pages

[Hoodie-Huuuuu]

Before this PR, the only way to access the documentation was by browsing through the repository's markdown files.
Using the mkdocs framework, an alternative way was created to view documentation as a website.

This patch contains:

• Mkdocs config file mkdocs.yml.
• Small corrections in .md files for more correct rendering on the website.
• Custom hooks before site build to ensure .md file links remain accurate in both the website and repository versions of the docs.
• CI workflow to deploy the documentation site to GitHub Pages.

To check how the site looks locally, you need to:

make doc

Open documentation on http://localhost:8000/

Important:

• In the repository settings, set the Github Actions source for Github Pages.
  Settings -> Pages -> Build and deployment: "GitHub Actions"
• The documentation is deployed in the github-pages environment.
  You can set up rules for each environment (for example, a timer for deferred deployment)
  Settings -> Environment -> [env-name]

[hackallcode]

Looks great! However, let's tune some things

[hackallcode]

I have a few more comments

[choseenonee]

You've did a good job!

[hackallcode]

Looks really great! Thank you!