feat(CI): Added eslint workflow from nextcloud template repository

Signed-off-by: Ferdinand Thiessen <rpm@fthiessen.de>

.github/workflows/lint-eslint.yml

@@ -0,0 +1,62 @@
+# This workflow is provided via the organization template repository
+#
+# https://github.com/nextcloud/.github
+# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+#
+# Use lint-eslint together with lint-eslint-when-unrelated to make eslint a required check for GitHub actions
+# https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/defining-the-mergeability-of-pull-requests/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+
+name: Lint
+
+on:
+  pull_request:
+    paths:
+      - '.github/workflows/**'
+      - 'src/**'
+      - 'appinfo/info.xml'
+      - 'package.json'
+      - 'package-lock.json'
+      - 'tsconfig.json'
+      - '.eslintrc.*'
+      - '.eslintignore'
+      - '**.js'
+      - '**.ts'
+      - '**.vue'
+
+permissions:
+  contents: read
+
+concurrency:
+  group: lint-eslint-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    name: eslint
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3
+
+      - name: Read package.json node and npm engines version
+        uses: skjnldsv/read-package-engines-version-actions@1bdcee71fa343c46b18dc6aceffb4cd1e35209c6 # v1.2
+        id: versions
+        with:
+          fallbackNode: '^16'
+          fallbackNpm: '^7'
+
+      - name: Set up node ${{ steps.versions.outputs.nodeVersion }}
+        uses: actions/setup-node@8c91899e586c5b171469028077307d293428b516 # v3
+        with:
+          node-version: ${{ steps.versions.outputs.nodeVersion }}
+
+      - name: Set up npm ${{ steps.versions.outputs.npmVersion }}
+        run: npm i -g npm@"${{ steps.versions.outputs.npmVersion }}"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint