cloudflare (work in progress, to be updated)

[alexanderniebuhr]

(work in progress, to be updated)

### Infra
- [x] setup repo/monorepo for cloudflare
- [x] remove build script and build ci
- [x] setup new deployment ci
- [ ] setup tests
- [ ] https://github.com/withastro/houston-discord/issues/73

### Must-Haves
- [x] match current features

### Stretch Goals
- [ ] auto-updating `/ptal`
- [ ] https://github.com/withastro/houston-discord/issues/58