Add PR changelog check

.github/workflows/check-pr-changelog.yml

@@ -0,0 +1,44 @@
+name: Check if PR changelog was filled
+on:
+    merge_group:
+    pull_request:
+
+jobs:
+  check-changelog:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - run: npm install js-yaml@4.1.0
+      - name: Fail if PR changelog has not been filled
+        uses: actions/github-script@v6
+        id: check-changelog
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const yaml = require('js-yaml');
+
+            const prDescription = await github.rest.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: context.issue.number
+            });
+
+            const changelogRegex = /# Changelog([\s\S]*?)(?=\n#[^#])/;
+            const changelogMatch = prDescription.data.body.match(changelogRegex);
+            const changelogContent = changelogMatch ? changelogMatch [1].trim() : '';
+          
+            const yamlRegex = /```yaml([\s\S]*?)```/;
+            const yamlMatch = changelogContent.match(yamlRegex);
+            const yamlContent = yamlMatch ? yamlMatch[1].trim() : '';
+          
+            console.log(yaml.load(yamlContent))
+          
+            if (changelogDescription === '<insert-changelog-description-here>') {
+              throw 'PR changelog description has not been updated!'
+            }
+            if (changelogDescription === '') {
+              throw 'PR changelog description field is missing!'
+            }
+