Add action to check commit messages for line length.

.github/workflows/commit-message-check.yml

@@ -0,0 +1,34 @@
+name: 'Commit Message Check'
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - reopened
+      - synchronize
+  push:
+    branches:
+      - master
+      - 'releases/*'
+
+jobs:
+  check-commit-message:
+    name: Check Commit Message
+    runs-on: ubuntu-latest
+    steps:
+#     - name: Check Commit Type
+#       uses: gsactions/commit-message-checker@v1
+#       with:
+#         pattern: '\[[^]]+\] .+$'
+#         flags: 'gm'
+#         error: 'Your first line has to contain a commit type like "[BUGFIX]".'
+      - name: Check Line Length
+        uses: gsactions/commit-message-checker@v1
+        with:
+          pattern: '^[^#].{78}'
+          error: 'The maximum line length of 78 characters is exceeded.'
+#     - name: Check for Resolves / Fixes
+#       uses: gsactions/commit-message-checker@v1
+#       with:
+#         pattern: '^.+(Resolves|Fixes): \#[0-9]+$'
+#         error: 'You need at least one "Resolves|Fixes: #<issue number>" line.'