Refactor menu view and add build number and environment label

lib/features/shared_widgets/build_number_environment.dart

@@ -0,0 +1,16 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_dotenv/flutter_dotenv.dart';
+import 'package:syncrow_app/main.dart';
+
+Widget buildNumberAndEnvironmentLabel() {
+  String envNAME = dotenv.env['ENV_NAME'] ?? '';
+
+  return SizedBox(
+    child: Center(
+      child: Text(
+        '\n$envNAME \nBuild Number $buildNumber',
+        textAlign: TextAlign.center,
+      ),
+    ),
+  );
+}