Bundle pre-generated alert sounds

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@enne2/pi-policy-gate",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "description": "Policy gate extension for pi that classifies risky tool calls into allow, confirm, deny, or require-refinement.",
   "type": "module",
   "keywords": [
@@ -13,7 +13,8 @@
   "files": [
     "index.ts",
     "README.md",
-    "policy-gate.example.json"
+    "policy-gate.example.json",
+    "assets/*.wav"
   ],
   "pi": {
     "extensions": [
@@ -22,7 +23,8 @@
   },
   "scripts": {
     "check": "npm pack --dry-run >/dev/null",
-    "pack:check": "npm pack --dry-run"
+    "pack:check": "npm pack --dry-run",
+    "generate:sounds": "python3 scripts/generate_sounds.py"
   },
   "dependencies": {
     "minimatch": "^10.1.1"