feat(ai): Fetch Anthropic, Google, and OpenAI models from models.dev instead of OpenRouter

- Updated generate-models.ts to fetch these providers directly from models.dev API
- OpenRouter now only used for xAI and other third-party providers
- Fixed test model IDs to match new model names from models.dev
- Removed unused import from google.ts

packages/ai/test/models.ts

@@ -0,0 +1,31 @@
+import { GoogleGenAI } from "@google/genai";
+import OpenAI from "openai";
+
+const ai = new GoogleGenAI({});
+
+async function main() {
+    /*let pager = await ai.models.list();
+    do {
+        for (const model of pager.page) {
+            console.log(JSON.stringify(model, null, 2));
+            console.log("---");
+        }
+        if (!pager.hasNextPage()) break;
+        await pager.nextPage();
+    } while (true);*/
+
+    const openai = new OpenAI();
+    const response = await openai.models.list();
+    do {
+        const page = response.data;
+        for (const model of page) {
+            const info = await openai.models.retrieve(model.id);
+            console.log(JSON.stringify(model, null, 2));
+            console.log("---");
+        }
+        if (!response.hasNextPage()) break;
+        await response.getNextPage();
+    } while (true);
+}
+
+await main();