Improvements

[augustin4s]

• Switch to lsp-zero configuration
• Configure lsp for the majority of used languages with formatting, etc (C, js, lua, sh, jsx)
• Make lsp diagnostics and other (usually annoying) visuals optionally enabled with a key bind
• Complete lsp keymapping for most used functionality
• Consider migrating from Packer to lazy-vim

Configure code formatting based on file type + readability like:

• C - for C we can simply use the .clang-format file with BasedOnStyle: Microsoft/Google/LLVM etc, and tab indentations

• Cleanup and refactor setup-plugins script