feat: Add GitHub Action to verify CHANGELOG.md updates in pull requests

Author: katsar0v

.github/workflows/check-changelog.yml

@@ -0,0 +1,30 @@
+name: Check Changelog
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+
+jobs:
+  check-changelog:
+    name: Verify Changelog Update
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Check for CHANGELOG.md modification
+        run: |
+          # Fetch the base branch to ensure we can diff against it
+          git fetch origin ${{ github.base_ref }}
+          
+          # Check if CHANGELOG.md is in the list of changed files
+          if git diff --name-only origin/${{ github.base_ref }} ${{ github.event.pull_request.head.sha }} | grep -q "^CHANGELOG.md$"; then
+            echo "✅ CHANGELOG.md has been modified."
+            exit 0
+          else
+            echo "❌ Error: CHANGELOG.md was not modified in this Pull Request."
+            echo "Please add an entry to CHANGELOG.md describing your changes."
+            exit 1
+          fi