build: replace tslint with Biome for code quality

- Add @biomejs/biome as dev dependency
- Remove deprecated tslint dependency
- Add biome.json with project-specific rules
- Update lint script to use Biome
- Apply Biome auto-fixes across codebase

package.json

@@ -17,10 +17,10 @@
     "zod-to-json-schema": "^3.25.1"
   },
   "devDependencies": {
+    "@biomejs/biome": "^1.9.4",
     "@types/lodash-es": "^4.17.12",
     "@types/node": "^22.13.10",
     "concurrently": "^9.2.1",
-    "tslint": "^6.1.3",
     "typescript": "^5.8.2"
   },
   "files": [
@@ -35,7 +35,7 @@
     "build": "rm -rf dist && tsc",
     "start": "bun run src/index.ts",
     "start:prod": "bun run dist/index.js",
-    "lint": "tslint -c tslint.json src/**/*.ts",
+    "lint": "biome check src/",
     "test": "bun test"
   },
   "keywords": [