UniGPT provider for pi

Native /login with a verified API key, automatic model discovery from
UniGPT's /models endpoint, per-deployment deployment-id headers, and
model metadata from pi's bundled catalog.

tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "target": "ES2023",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "strict": true,
+    "noEmit": true,
+    "allowImportingTsExtensions": true,
+    "skipLibCheck": true,
+    "types": [
+      "node"
+    ]
+  },
+  "include": [
+    "src/**/*.ts",
+    "test/**/*.ts"
+  ]
+}