1. For M1/M2/etc. devices the homebrew location is slightly different, so note that.
2. For clang, linking to pthreads is slightly different so note that as well.
Added meta tags for homepage
Added meta description generator
Removed usages of <h1> (mkdocs-material doesn't reconize more than 1)
added space after # (markdown proper syntax)
removed pip3 command from pull request CI