chore: add pnpm lockfile, fix core tsconfig

Remove reflect-metadata type reference from core/tsconfig.json —
it will be added in Plan 2 when InversifyJS is installed.

packages/core/tsconfig.json

@@ -4,8 +4,7 @@
     "baseUrl": ".",
     "paths": {
       "@/*": ["./src/*"]
-    },
-    "types": ["reflect-metadata"]
+    }
   },
   "include": ["src/**/*.ts"],
   "exclude": ["node_modules", "dist"]