feat(authentication): add google sign in in signIn cubit

packages/wyatt_authentication_bloc/example/lib/presentation/features/sign_in/widgets/sign_in_form.dart

@@ -94,6 +94,22 @@ class _SignInAnonymouslyButton extends StatelessWidget {
   }
 }
 
+class _SignInWithGoogleButton extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return SubmitBuilder<SignInCubit<int>>(
+      builder: ((context, cubit, status) {
+        return status.isSubmissionInProgress
+            ? const CircularProgressIndicator()
+            : ElevatedButton(
+                onPressed: () => cubit.signInWithGoogle(),
+                child: const Text('Sign in Google'),
+              );
+      }),
+    );
+  }
+}
+
 class SignInForm extends StatelessWidget {
   const SignInForm({Key? key}) : super(key: key);
 
@@ -116,6 +132,8 @@ class SignInForm extends StatelessWidget {
             _SignInButton(),
             const SizedBox(height: 16),
             _SignInAnonymouslyButton(),
+            const SizedBox(height: 16),
+            _SignInWithGoogleButton(),
           ],
         ),
       ),