✨ Refactor docs for building scripts, use MkDocs hooks, simplify (remove) configs...

✨ Refactor docs for building scripts, use MkDocs hooks, simplify (remove) configs for languages (#9742)

* ✨ Add MkDocs hooks to re-use all config from en, and auto-generate missing docs files form en

* 🔧 Update MkDocs config for es

* 🔧 Simplify configs for all languages

* ✨ Compute available languages from MkDocs Material for config overrides in hooks

* 🔧 Update config for MkDocs for en, to make paths compatible for other languages

* ♻️ Refactor scripts/docs.py to remove all custom logic that is now handled by the MkDocs hooks

* 🔧 Remove ta language as it's incomplete (no translations and causing errors)

* 🔥 Remove ta lang, no translations available

* 🔥 Remove dummy overrides directories, no longer needed

* ✨ Use the same missing-translation.md file contents for hooks

* ⏪️ Restore and refactor new-lang command

* 📝 Update docs for contributing with new simplified workflow for translations

* 🔊 Enable logs so that MkDocs can show its standard output on the docs.py script