feat: create instabug CLI with --help flag

Author: MoKamall

bin/instabug.dart

@@ -0,0 +1,14 @@
+#!/usr/bin/env dart
+
+import 'package:args/args.dart';
+
+void main(List<String> args) {
+  final parser = ArgParser()..addFlag('help', abbr: 'h');
+  final result = parser.parse(args);
+  if (result['help'] as bool) {
+    print('Usage: instabug [options]');
+    print(parser.usage);
+    return;
+  }
+  // …call into your SDK’s API…
+}

pubspec.yaml

@@ -37,3 +37,6 @@ flutter:
 environment:
   sdk: ">=2.14.0 <4.0.0"
   flutter: ">=1.17.0"
+
+executables:
+  instabug: instabug