Add initial project files and configurations for clawd_code

bin/clawd_code.dart

@@ -0,0 +1,8 @@
+import 'dart:io';
+
+import 'package:clawd_code/clawd_code.dart';
+
+Future<void> main(List<String> args) async {
+  final statusCode = await runClawdCode(args);
+  exit(statusCode);
+}