fix(workflow): resolve type errors across all packages and remove tsbuildinfo from tracking

- Add bun-types and @types/xxhashjs to root devDependencies
- Add types: ['bun-types'] to root and package tsconfigs
- Fix AST Node type narrowing in bundle-validator.ts with AcornNode type and narrowNode helper
- Fix generic ThreadContext variance in create-role-moderator.ts
- Add explicit parameter types in worker.ts
- Fix ChildProcess type in worker-spawn.ts to match spawn() stdio config
- Remove all tsconfig.tsbuildinfo from git tracking
- Add tsconfig.tsbuildinfo to .gitignore

package.json

@@ -12,6 +12,8 @@
     "test": "bun run --filter '*' test"
   },
   "devDependencies": {
-    "@biomejs/biome": "^2.4.14"
+    "@biomejs/biome": "^2.4.14",
+    "@types/xxhashjs": "^0.2.4",
+    "bun-types": "^1.3.13"
   }
 }