Added blocking issues workflow

.github/workflows/blocking-issues.yml

@@ -0,0 +1,20 @@
+name: Blocking Issues
+
+on:
+  issues:
+    types: [opened, edited, deleted, transferred, closed, reopened]
+  pull_request_target:
+    types: [opened, edited, closed, reopened]
+
+jobs:
+  blocking_issues:
+    runs-on: ubuntu-latest
+    name: Checks for blocking issues
+
+    steps:
+      - uses: Levi-Lesches/blocking-issues@v2
+        with:
+          # Optional: Choose an existing label to use instead of creating a new one.
+          # If the label cannot be found, the default one will be created and used.
+          # The default is: "blocked" (black).
+          use-label: "blocked issue"