moved shutdown handler to own library

libs/shutdown/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "@stock-bot/shutdown",
+  "version": "1.0.0",
+  "description": "Graceful shutdown management for Stock Bot platform",
+  "type": "module",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "build": "tsc",
+    "dev": "tsc --watch",
+    "clean": "rm -rf dist"
+  },
+  "dependencies": {},
+  "devDependencies": {
+    "typescript": "^5.0.0",
+    "@types/node": "^20.0.0"
+  },
+  "exports": {
+    ".": {
+      "import": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    }
+  },
+  "files": [
+    "dist"
+  ]
+}