Add workflow to check for broken links.

Author: rkistner

.github/workflows/check.yaml

@@ -0,0 +1,23 @@
+name: Check Documentation
+
+on:
+  push:
+    branches:
+      - '**'
+    tags-ignore:
+      - '**'
+
+jobs:
+  check:
+    name: Check Documentation
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+
+      # This checks internal links, but does not validate external links
+      - name: Check for broken links
+        run: npx mintlify broken-links