* Make custom Leaf tag examples complete
As reported in [vapor/vapor#2942](https://github.com/vapor/vapor/issues/2942), UnsafeUnescapedLeafTag is going unnoticed.
To bring more attention to it, I moved the tip to the top section in all languages, updated the HelloTag to use the protocol (since it was rendering garbage since the LeafKit update).
Plus, all the code samples are now directly copiable, as they have a common structure and indentation.
* Hardcode RediStack 1.3.2 doc URLs to fix dead links
* Update the main page
* Remove old docs
* Remove old version links and add link to legacy docs
* Fix site URLs in mkdocs.yml
* Move 4.0 docs to top level
* Update fix search index script
* Fix font CSS links
* Update 404 and gitignore
* Update CI and remove all other 4.0 links
* Fix font issue still loading from google
* Update NL index page, remove link to vapor core team (inaccessible)
Co-authored-by: De Bock Benny <bdebock@protonmail.com>
Tim Condon
Zsolt Váradi
BennyDB
Tim
晋先森