chore: add package.json for pi package installation

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "@enne2/context-warn",
+  "version": "1.0.0",
+  "description": "Pi agent extension: sound alert when context reaches 100k tokens",
+  "keywords": ["pi-package", "extension", "context", "warning", "alert"],
+  "pi": {
+    "extensions": ["."]
+  },
+  "peerDependencies": {
+    "@earendil-works/pi-coding-agent": "*"
+  },
+  "scripts": {
+    "test": "echo 'OK'"
+  }
+}