ci: add lint PR title workflow and dependabot github-actions

.github/dependabot.yml

@@ -1,5 +1,10 @@
 version: 2
 updates:
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: weekly
+  open-pull-requests-limit: 10
 - package-ecosystem: npm
   directory: "/"
   schedule:

.github/workflows/ci.yml

@@ -0,0 +1,43 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+      - '10.16'
+    tags:
+      - '**'
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  docs-build:
+    name: Build documentation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
+        with:
+          node-version: '22'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build documentation
+        run: npm run antora
+
+  trigger-docs:
+    name: Trigger docs build
+    runs-on: ubuntu-latest
+    needs: docs-build
+    if: |
+      github.event_name == 'push' &&
+      (github.ref == 'refs/heads/master' || github.ref == 'refs/heads/10.16')
+    steps:
+      - uses: peter-evans/repository-dispatch@ff45666b9427631e3450c54a1bcbee4d9ff4d7c0 # v3.0.0
+        with:
+          token: ${{ secrets.DOCS_TRIGGER_TOKEN }}
+          repository: owncloud/docs
+          event-type: docs-rebuild

.github/workflows/lint-pr-title.yml

@@ -0,0 +1,16 @@
+name: Lint PR title
+
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: amannn/action-semantic-pull-request@48f256284bd46cdaab1048c3721360e808335d50 # v6.1.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}