add gh workflow for catching broken links

Author: brendan-kellam

.github/workflows/docs-broken-links.yml

@@ -0,0 +1,25 @@
+name: Check for broken links in docs
+
+on:
+  pull_request:
+    branches: ["main"]
+    paths:
+      - "docs/**"
+
+jobs:
+  check-links:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Use Node.Js
+        uses: actions/setup-node@v4
+        with:
+            node-version: '20.x'
+
+      - name: Install Mintlify CLI
+        run: npm i -g mintlify
+
+      - name: Check for broken links
+        run: mintlify broken-links