fix some typos and similar mistakes

ignore archive.is links from lychee ci checks

Add more learning content + fix links

add lychee CI integration for links

add rust power tools to rust language guide (extras learn rust)

improve/update guide with new content

Update extra.md: add missing title newlines

improve learn more rust extra

expand and improve the rust 101 guide a bit

improve guide, make support more subtle and add rust lunch book

Update appendix-ix-shipping-rust.md: add render

improve sponsors section

be consistent with euro sign

show amazon loc links as prices

turn amazon links into mdbook links