refactor: Use ESM (#8358)

* wip

* wip

* fix

* clean up

* Update tsconfig.json

* Update activitypub.ts

* wip

packages/backend/src/misc/emoji-regex.ts

@@ -1,3 +1,4 @@
-const twemojiRegex = require('twemoji-parser/dist/lib/regex').default;
+import * as twemoji from 'twemoji-parser/dist/lib/regex.js';
+const twemojiRegex = twemoji.default;
 
 export const emojiRegex = new RegExp(`(${twemojiRegex.source})`);