[WIP] A (somewhat barebones) atproto app for creating custom sites without hosting!

server: major refactor master

- subdomain specific code (index handler and user site handler) are now in /routes - constants from index.ts are now defined in utils.ts so they can be used by other files - rkey <=> url functions are now in utils.ts - new and old error/404 pages which were plaintext now look nicer and have the atcities ascii logo - designed the atcities logo. added in ascii TODO: design and add a proper svg - remove logic related to resolving pdses and fetching blobs this will return in backfilling