feat: Add scaffolding for AI extension

extensions/ai/extension.yaml

@@ -0,0 +1,5 @@
+
+api: 
+- name: ai
+  version: v0.0.1
+  description: AI extension for api-testing

extensions/ai/main.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func main() {
+	fmt.Println("AI extension placeholder started.")
+	// Keep the extension alive to simulate a running service
+	for {
+		time.Sleep(time.Minute)
+	}
+}

pkg/testing/testdata/data/core/extension.yaml

@@ -3,3 +3,5 @@ items:
     dependencies:
       - name: atest-store-database
     link: https://github.com/LinuxSuRen/atest-ext-store-database
+  - name: ai
+    link: ./extensions/ai