feat: Add chat webhook

tests/test_webhook.py

@@ -0,0 +1,12 @@
+import pytest
+
+
+class TestWebhookChatBot:
+    """Tests for WebhookChatBot."""
+
+    @pytest.mark.anyio
+    async def tests_webhook_success(self, async_client):
+        """Test that the webhook endpoint returns a successful response."""
+        response = await async_client.post("/webhook", json={"message": "Hello"})
+        assert response.status_code == 200
+        assert response.json() == {"reply": "Hello, how can I assist you?"}