Populate wiki with documentation
Let's use this overview project as a way to aggregate issues and documentation since Lox is made of many different pieces. A good start would be:
- There's some high level docs written up at https://gitlab.torproject.org/cohosh/lox/-/wikis/Lox-Overview that should be moved here and also checked to see if they are accurate
- @onyinyang made some cool graphics at team#116 (comment 2884107)