improve Documentation

[Rar9]

since this cms project is very time consuming and has drastically changed when we first added some documentations we need to:

• [ ] switch to mdx (https://mdxjs.com/)
• [ ] clearly structure docs for developers /user for easy reference.
• [ ] improve .mdx structure for easier maintaince
  • [ ] each mdx files structure
    • [x] title
    • [x] description
    • [x] icon
    • [x] date