ci: add ESLint and Prettier checks to CI workflow

- Add lint script to run ESLint on all source files
- Add format script to check Prettier formatting
- Update CI workflow to run lint and format checks on PRs
- Format check is non-blocking (continue-on-error) due to existing code style

Author: claude

.github/workflows/test.yml

@@ -38,7 +38,7 @@ jobs:
           CI: true
 
   lint:
-    name: Lint
+    name: Lint & Format
     runs-on: ubuntu-latest
 
     steps:
@@ -54,5 +54,12 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
-      - name: Build
+      - name: Build (required for type-aware linting)
         run: npm run build
+
+      - name: Run ESLint
+        run: npm run lint
+
+      - name: Check Prettier formatting
+        run: npm run format
+        continue-on-error: true  # Existing code has formatting issues

package.json

@@ -5,6 +5,10 @@
     "publish": "lerna publish",
     "build": "lerna run build",
     "test": "lerna run test",
+    "lint": "eslint --ext .ts ts-cache/src storages/*/src",
+    "lint:fix": "eslint --ext .ts ts-cache/src storages/*/src --fix",
+    "format": "prettier --check \"**/*.{ts,js,json,md}\" --ignore-path .gitignore",
+    "format:fix": "prettier --write \"**/*.{ts,js,json,md}\" --ignore-path .gitignore",
     "release": "lerna publish",
     "prepublishOnly": "npm run test",
     "check-package-updates": "ncu -u && gulp updatePackages"