Add Semver PR Label Check workflow

Author: jcouball

.github/workflows/semver_pr_label_check.yml

@@ -0,0 +1,15 @@
+name: Semver PR Label Check
+
+# Enforces that every PR must have a semver label: major-change, minor-change,
+# patch-change, internal-change, or release
+
+on:
+  pull_request:
+    branches: [main]
+    types: [opened, synchronize, reopened, labeled, unlabeled]
+
+jobs:
+  run_semver_pr_label_check:
+    uses: main-branch/semver_pr_label_check/.github/workflows/semver_pr_label_check.yml@main
+    secrets:
+      repo_token: ${{ secrets.GITHUB_TOKEN }}