chore: use a new action to better check the contribution content

Use new action to validate if contribution (PR) follows the guidelines on documentation content

For now only check if:
files contain:description: attributes
files not contain any forbidden attribute

Covers bonitasoft/bonita-documentation-site#591

.github/workflows/contribution-checks.yml

@@ -0,0 +1,10 @@
+name: Contribution checks
+
+on:
+  pull_request:
+
+jobs:
+  check_antora_content_guidelines:
+    permissions:
+      pull-requests: write # "pr-antora-content-guidelines-checker" write PR comments when the PR doesn't match the "Guidelines"
+    uses: bonitasoft/bonita-documentation-site/.github/workflows/_reusable_pr-antora-content-guidelines-checker.yml@master