feat: scaffold worker application shell

Adds apps/worker with TypeScript config, BullMQ/ioredis dependencies,
pino logger bootstrap, and a smoke test. Queue consumers wired in later phases.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/worker/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "@tower/worker",
+  "version": "0.0.1",
+  "scripts": {
+    "build": "tsc",
+    "dev": "ts-node src/main.ts",
+    "start": "node dist/main.js",
+    "test": "jest"
+  },
+  "dependencies": {
+    "@tower/config": "workspace:*",
+    "@tower/logger": "workspace:*",
+    "@tower/types": "workspace:*",
+    "bullmq": "^5.0.0",
+    "ioredis": "^5.0.0"
+  },
+  "devDependencies": {
+    "@types/jest": "^29.0.0",
+    "@types/node": "^22.0.0",
+    "jest": "^29.0.0",
+    "ts-jest": "^29.0.0",
+    "ts-node": "^10.9.0",
+    "typescript": "^5.7.0"
+  }
+}