ci: Add link checker pipeline

Author: deandreamatias

.github/workflows/form_builder.yaml

@@ -0,0 +1,19 @@
+name: Form Builder Repository
+
+on:
+  push:
+    branches: [master]
+
+  pull_request:
+    branches: [master]
+
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Check broken links
+        uses: JustinBeckwith/linkinator-action@v1