chore: use a new action to better check the contribution content (#149)

Use the new use reusable workflow to validate if the 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
Covers bonitasoft/bonita-documentation-site#422

.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