feat(antigravity): add Google Antigravity auth plugin with auto-rotation, model catalog and multi-turn support

server/plugins/build-in/antigravity-auth/main.ts

@@ -0,0 +1,24 @@
+import { defineProviderPlugin } from "cursor-byok:plugin";
+import { antigravityDeviceOAuth } from "./oauth.ts";
+import { antigravityProvider } from "./provider.ts";
+import {
+  credentialImport,
+  presentAccount,
+  refreshAccount,
+  RESOURCE_TYPE,
+} from "./resources.ts";
+
+export default defineProviderPlugin({
+  providers: [antigravityProvider],
+  resources: [{
+    type: RESOURCE_TYPE,
+    displayName: {
+      "en-US": "Google accounts & API keys",
+      "zh-CN": "Google 账号与 API 密钥",
+    },
+    add: [antigravityDeviceOAuth],
+    import: credentialImport,
+    present: presentAccount,
+    refresh: refreshAccount,
+  }],
+});