Update package.json with module type and dev dependencies

Author: ofriw

package.json

@@ -1,21 +1,28 @@
 {
   "name": "pi-agenticoding",
   "version": "0.2.0",
+  "type": "module",
   "description": "Context management primitives for the pi coding agent — spawn, ledger, handoff",
   "license": "MIT",
-  "keywords": ["pi-package"],
+  "keywords": [
+    "pi-package"
+  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/agenticoding/pi-agenticoding.git"
   },
   "peerDependencies": {
     "@earendil-works/pi-ai": "*",
-    "@earendil-works/pi-agent-core": "*",
     "@earendil-works/pi-coding-agent": "*",
     "@earendil-works/pi-tui": "*",
     "typebox": "*"
   },
+  "devDependencies": {
+    "typescript": "^6.0.3"
+  },
   "pi": {
-    "extensions": ["./index.ts"]
+    "extensions": [
+      "./index.ts"
+    ]
   }
 }