refactor: Use ESM (#8358)

* wip

* wip

* fix

* clean up

* Update tsconfig.json

* Update activitypub.ts

* wip

packages/backend/src/server/api/endpoints/i/registry/set.ts

@@ -1,7 +1,7 @@
-import { publishMainStream } from '@/services/stream';
-import define from '../../../define';
-import { RegistryItems } from '@/models/index';
-import { genId } from '@/misc/gen-id';
+import { publishMainStream } from '@/services/stream.js';
+import define from '../../../define.js';
+import { RegistryItems } from '@/models/index.js';
+import { genId } from '@/misc/gen-id.js';
 
 export const meta = {
 	requireCredential: true,