Fix a2a_wrapper imports and add clean usage example

- Remove top-level imports from fuzzforge_ai/__init__.py to avoid dependency issues
- Fix config_bridge.py exception handling (remove undefined exc variable)
- Add examples/test_a2a_simple.py demonstrating clean a2a_wrapper usage
- Update package to use explicit imports: from fuzzforge_ai.a2a_wrapper import send_agent_task

All functionality preserved, imports are now explicit and modular.

examples/test_a2a_simple.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+"""
+Simple example of using the A2A wrapper
+Run from project root: python examples/test_a2a_simple.py
+"""
+import asyncio
+
+
+async def main():
+    # Clean import!
+    from fuzzforge_ai.a2a_wrapper import send_agent_task
+
+    print("Sending task to agent at http://127.0.0.1:10900...")
+
+    result = await send_agent_task(
+        url="http://127.0.0.1:10900/a2a/litellm_agent",
+        model="gpt-4o-mini",
+        provider="openai",
+        prompt="You are concise.",
+        message="Give me a simple Python function that adds two numbers.",
+        context="test_session",
+        timeout=120
+    )
+
+    print(f"\nContext ID: {result.context_id}")
+    print(f"\nResponse:\n{result.text}")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())