feat(ask): add initial ask tool prototype and project setup

src/index.ts

@@ -0,0 +1,6 @@
+import type { ExtensionAPI } from "@mariozechner/pi-coding-agent";
+import { registerAskTool } from "./ask-tool.ts";
+
+export default function askExtension(pi: ExtensionAPI) {
+	registerAskTool(pi);
+}