workflows: ci-pr-signoff-check: add PR signoff checker

Add a PR signoff checker which ensures that the number of commit
signatures is greater or equal to the number of PR reviewers with
approvals. This check further improves and maintains repository
quality.

Signed-off-by: Zanelle Botha <[email protected]>
Reviewed-by: Annemie Potgieter <[email protected]>
Reviewed-by: Marthinus Bekker <[email protected]>
Signed-off-by: Louis Peens <[email protected]>

.github/workflows/ci-pr-signoff-check.yaml

@@ -0,0 +1,27 @@
+---
+# This workflow performs linting checks to promote code quality.
+name: Check PR commit signoffs
+
+# Run when opening a PR or push to PR
+on:
+  pull_request:
+  pull_request_review:
+    types: [submitted]
+
+jobs:
+  linters:
+    runs-on:
+      - ci-linter-vm
+      - self-hosted
+    steps:
+      - name: Checkout current repository
+        uses: Corigine/ci-libs/github_actions/utilities/checkout_corigine@main
+        with:
+          token: ${{ secrets.GHUB_TOKEN }}
+          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.ref }}
+
+      - name: Check commit message format
+        uses: Corigine/ci-libs/github_actions/linting/commit_check@main
+        with:
+          token: ${{ secrets.GHUB_TOKEN }}