Create checker.yml

.github/workflows/checker.yml

@@ -0,0 +1,19 @@
+name: Check if a PR has a valid Issue
+
+on:
+  pull_request_target:
+    types: [ edited, synchronize, opened, reopened ]
+
+jobs:
+  checker:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      
+      - name: Issue Validator
+        uses: HarshCasper/validate-issues-over-pull-requests@v0.1.1
+        id: validator
+        with:
+          prbody: ${{ github.event.pull_request.body }}
+          prurl: ${{ github.event.pull_request.url }}