ci: add workflow to auto-fix lint and formatting

.github/workflows/lint-format.yml

@@ -0,0 +1,60 @@
+name: lint-format
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+
+concurrency:
+  group: lint-format-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  check-and-fix:
+    runs-on: ubuntu-latest
+    if: "!contains(github.event.head_commit.message, '[skip ci]') && !contains(github.event.head_commit.message, '[ci skip]')"
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: oven-sh/setup-bun@v2
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Run checks
+        id: check
+        continue-on-error: true
+        run: |
+          bun run lint
+          bun run format:check
+          bun run lint:md
+
+      - name: Apply fixes
+        run: |
+          bunx eslint src/ --fix
+          bunx prettier --write .
+          bunx markdownlint "**/*.md" --ignore node_modules --ignore dist --fix
+
+      - name: Commit and push fixes
+        if: steps.check.outcome == 'failure'
+        run: |
+          if [ -z "$(git status --porcelain)" ]; then
+            echo "No changes to commit"
+            exit 0
+          fi
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git config commit.gpgsign false
+          git add -A
+          git commit -m "chore: auto-fix lint & formatting [skip ci]"
+          git push
+
+      - name: Verify fixes
+        run: |
+          bun run lint
+          bun run format:check
+          bun run lint:md