docs(onlinedocs): mkdocs with material theme for the readme file to a…

[AbdoALPOP]

…llow users to view as an online guide

Description

Checklist

• [x] the pull request title describes what this PR does (not a vague title like Update index.md)
• [x] the pull request targets the default branch of the repository (develop)
• [ ] the code follows the established code style of the repository
  • npm run prettier:check passes
  • npm run lint:check passes
• [ ] tests are added for the changes I made (if any source code was modified)
• [x] documentation added or updated
• [x] I have run the project locally and verified that there are no errors

Fixes

fixes #[issue number], fixes #[issue number]

[AbdoALPOP]

https://class-validator.sonicar.tech/