rebrand: media-db-sync fork + fix bun test resolution

- manifest/manifest-beta/package.json → id media-db-sync, v0.1.0
- pluginName const → media-db-sync
- tsconfig: baseUrl (bun test needs it for packages/* paths) + ignoreDeprecations 6.0
- upstream tests were broken on clean checkout (module resolution) → 31/31 pass now

tsconfig.json

@@ -1,5 +1,7 @@
 {
 	"compilerOptions": {
+		"baseUrl": ".",
+		"ignoreDeprecations": "6.0",
 		"paths": {
 			"packages/*": ["./packages/*"],
 			"tests/*": ["./tests/*"]