feat: set up quality gates for CCS TypeScript package

- Migrate package manager from npm to bun
- Add ESLint configuration with TypeScript support
- Add Prettier configuration and .prettierignore
- Format all TypeScript source files
- Update CLAUDE.md with bun instructions
- Verify 39 tests passing

package.json

@@ -39,8 +39,10 @@
     "LICENSE"
   ],
   "engines": {
-    "node": ">=14.0.0"
+    "node": ">=14.0.0",
+    "bun": ">=1.0.0"
   },
+  "packageManager": "bun@1.2.21",
   "os": [
     "darwin",
     "linux",
@@ -51,14 +53,20 @@
     "build": "tsc && node scripts/add-shebang.js",
     "build:watch": "tsc --watch",
     "prebuild": "rm -rf dist tsconfig.tsbuildinfo",
-    "test": "npm run build && npm run test:all",
-    "test:all": "npm run test:unit && npm run test:npm",
-    "test:unit": "npx mocha tests/shared/unit/**/*.test.js --timeout 5000",
-    "test:npm": "npx mocha tests/npm/**/*.test.js --timeout 10000",
+    "typecheck": "tsc --noEmit",
+    "lint": "eslint src/",
+    "lint:fix": "eslint src/ --fix",
+    "format": "prettier --write src/",
+    "format:check": "prettier --check src/",
+    "validate": "bun run typecheck && bun run lint && bun run format:check && bun run test",
+    "test": "bun run build && bun run test:all",
+    "test:all": "bun run test:unit && bun run test:npm",
+    "test:unit": "mocha tests/shared/unit/**/*.test.js --timeout 5000",
+    "test:npm": "mocha tests/npm/**/*.test.js --timeout 10000",
     "test:native": "bash tests/native/unix/edge-cases.sh",
     "test:edge-cases": "bash tests/edge-cases.sh",
-    "prepublishOnly": "npm run build && node scripts/sync-version.js",
-    "prepack": "npm run build && node scripts/sync-version.js",
+    "prepublishOnly": "npm run validate && node scripts/sync-version.js",
+    "prepack": "npm run validate && node scripts/sync-version.js",
     "prepare": "node scripts/check-executables.js",
     "postinstall": "node scripts/postinstall.js"
   },
@@ -68,7 +76,12 @@
   },
   "devDependencies": {
     "@types/node": "^20.19.25",
+    "@typescript-eslint/eslint-plugin": "^8.48.0",
+    "@typescript-eslint/parser": "^8.48.0",
+    "eslint": "^9.39.1",
+    "eslint-config-prettier": "^10.1.8",
     "mocha": "^11.7.5",
+    "prettier": "^3.6.2",
     "typescript": "5.3"
   }
 }