Add TestSuiteButton

Introduced a new reusable TestSuiteButton widget. It provides flexibility for positioning and is intended for initiating the test suite in the TaskQueueView.

frontend/lib/views/task_queue/test_suite_button.dart

@@ -0,0 +1,47 @@
+import 'package:auto_gpt_flutter_client/constants/app_colors.dart';
+import 'package:flutter/material.dart';
+
+class TestSuiteButton extends StatelessWidget {
+  final VoidCallback? onPressed;
+  final bool isDisabled;
+
+  TestSuiteButton({required this.onPressed, this.isDisabled = false});
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      height: 50,
+      child: ElevatedButton(
+        style: ElevatedButton.styleFrom(
+          backgroundColor: isDisabled ? Colors.grey : AppColors.primaryLight,
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(8.0),
+          ),
+          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+          elevation: 5.0,
+        ),
+        onPressed: isDisabled ? null : onPressed,
+        child: const Row(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Text(
+              'Initiate test suite',
+              style: TextStyle(
+                color: Colors.white,
+                fontSize: 12.50,
+                fontFamily: 'Archivo',
+                fontWeight: FontWeight.w400,
+              ),
+            ),
+            SizedBox(width: 10),
+            Icon(
+              Icons.play_arrow,
+              color: Colors.white,
+              size: 24,
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}