chore: initial commit

pi extension exposing a single search tool. Providers: Kagi (headless
Firefox against kagi.com session-token endpoint) and SearXNG (JSON API).
Config lives at ~/.pi/pi-search/config.json with env overrides.

tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+    "noEmit": true,
+    "allowImportingTsExtensions": true
+  },
+  "include": ["index.ts", "src/**/*.ts"]
+}