fix: load micropip first in fallback mechanism

The fallback was failing because micropip itself wasn't loaded.
Now we use pyodide.loadPackage() to load micropip first, then use it
to install ipython.

Author: rgbkrk

packages/pyodide-runtime-agent/src/pyodide-worker.ts

@@ -142,7 +142,15 @@ async function setupIPythonEnvironment(): Promise<void> {
     });
 
     try {
-      // Use micropip to install IPython
+      // First load micropip using pyodide.loadPackage
+      self.postMessage({
+        type: "log",
+        data: "Loading micropip for fallback installation",
+      });
+
+      await pyodide!.loadPackage(["micropip"]);
+
+      // Then use micropip to install IPython
       await pyodide!.runPythonAsync(`
         import micropip
         await micropip.install("ipython")