chore: add run.py entrypoint, update .gitignore and README

Moved the app entrypoint from app.py __main__ block to a dedicated
run.py. Updated .gitignore to exclude editor, superpowers, and OS files.

Made-with: Cursor

app.py

@@ -35,8 +35,3 @@ def create_app(start_scheduler=True):
             app.config["SCHEDULER_MANAGER"] = scheduler_mgr
 
     return app
-
-
-if __name__ == "__main__":
-    app = create_app()
-    app.run(host="0.0.0.0", port=5000, debug=False)