Add test for assistant creation and script execution

- Implemented TestCreate to validate the creation of the 'tests.create' assistant.
- Added context handling for the assistant, ensuring proper execution of the script with a sample user message.
- Enhanced error handling to check for the presence of the script in the assistant.

agent/assistant/hook/create_test.go

@@ -1,8 +1,11 @@
 package hook_test
 
 import (
+	"context"
 	"testing"
 
+	"github.com/yaoapp/yao/agent/assistant"
+	agentContext "github.com/yaoapp/yao/agent/context"
 	"github.com/yaoapp/yao/agent/testutils"
 )
 
@@ -10,4 +13,22 @@ import (
 func TestCreate(t *testing.T) {
 	testutils.Prepare(t)
 	defer testutils.Clean(t)
+
+	agent, err := assistant.Get("tests.create")
+	if err != nil {
+		t.Fatalf("Failed to get the tests.create assistant: %s", err.Error())
+	}
+
+	if agent.Script == nil {
+		t.Fatalf("The tests.create assistant has no script")
+	}
+
+	ctx := &agentContext.Context{
+		Context:     context.Background(),
+		ChatID:      "chat-test-create-hook",
+		AssistantID: "tests.create",
+		Sid:         "test-session-create-hook",
+	}
+
+	agent.Script.Create(ctx, []agentContext.Message{{Role: "user", Content: "Hello, how are you?"}})
 }