chore: prepare pigibrack npm package release

package.json

@@ -1,10 +1,36 @@
 {
+  "name": "pigibrack",
+  "version": "0.1.0",
+  "description": "Pi extension package for structural Scheme/Guile editing with a persistent REPL sidecar",
+  "license": "BSD-2-Clause",
+  "keywords": [
+    "pi-package",
+    "pi-extension",
+    "scheme",
+    "guile",
+    "lisp"
+  ],
+  "files": [
+    "extensions/pigibrack/**",
+    "README.md",
+    "LICENSE"
+  ],
+  "pi": {
+    "extensions": [
+      "./extensions/pigibrack/index.ts"
+    ]
+  },
+  "peerDependencies": {
+    "@mariozechner/pi-ai": "*",
+    "@mariozechner/pi-coding-agent": "*"
+  },
   "devDependencies": {
     "@mariozechner/pi-coding-agent": "^0.65.0"
   },
   "scripts": {
     "typecheck": "tsc --noEmit",
     "format": "prettier . --write",
-    "format:check": "prettier . --check"
+    "format:check": "prettier . --check",
+    "pack:dry-run": "npm pack --dry-run"
   }
 }