feat: evaluate js in yaml

Author: yuyutaotao

puppeteer-demo/demo.ts

@@ -41,6 +41,9 @@ Promise.resolve(
     // 👀 assert by AI
     await agent.aiAssert("There is a category filter on the left");
 
+    // 👀 click on the first item
+    await agent.aiTap("the first item in the list");
+
     await browser.close();
   })()
 );

yaml-scripts-demo/midscene-scripts/sauce-demo.yaml

@@ -15,3 +15,9 @@ tasks:
           {name: string, price: number, actionBtnName: string}[], return item name, price and the action button name on the lower right corner of each item (like 'Remove')
         name: items
       - aiAssert: The price of 'Sauce Labs Fleece Jacket' is 49.99
+
+  - name: run javascript code
+    flow:
+      - javascript: >
+          document.title
+        name: page-title