Revert "refactor: extract userbot to standalone repo, add as git submodule"

This reverts commit 3c383db9a7.

userbot/.unused/app.py

@@ -0,0 +1,12 @@
+from flask import Flask
+
+app = Flask(__name__)
+
+
+@app.route('/')
+def hello_world():
+    return 'This is Moon'
+
+
+if __name__ == '__main__':
+    app.run()