Add github workflow

.github/workflows/changelogger.yml

@@ -0,0 +1,40 @@
+name: Changelogger
+on: pull_request
+concurrency:
+  group: changelogger-${{ github.event_name }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  changelogger_used:
+    name: Changelogger use
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 10
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '7.4'
+          tools: composer:'2.3.2'
+
+      - name: Get Composer cache directory
+        id: composer-cache
+        run: |
+          echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Use composer cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-
+
+      - name: Check change files are touched for touched projects
+        env:
+          BASE: ${{ github.event.pull_request.base.sha }}
+          HEAD: ${{ github.event.pull_request.head.sha }}
+        run: tools/check-changelogger-use.php --debug "$BASE" "$HEAD"