Rebuild: fresh AdonisJS 7 API app on Postgres

The rebuild branch starts over (REBUILD.md): the API starter kit, with
Postgres instead of SQLite (its own database, DB_SEARCH_PATH for a
shared one in development) and the #lib alias. Phase 1's code is
imported from the current app module by module.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/content/index.ts

@@ -1,7 +0,0 @@
-/**
- * Content recognition by magic bytes, independent of AdonisJS.
- */
-export { sniffContentType, type ContentType } from './sniff.js'
-export { isArchiveStart, isLaterVolume, rarVolume } from './archive_names.js'
-export { parseSfv, sfvReleaseName, type SfvEntry } from './sfv.js'
-export { NICOVIDEO_FILE, NICOVIDEO_RELEASE, nicovideoInfo, nicovideoReleaseName, zstdPrefix, tarEntries, type NicovideoInfo } from './nicovideo.js'