(fix) Adding Markdown link checker to docs (#14832)

Author: dylburger

.github/workflows/docs-pr.yaml

@@ -0,0 +1,57 @@
+name: Validate MDX Links
+
+on:
+  pull_request:
+    paths:
+      - 'docs-v2/pages/**/*.mdx'
+  push:
+    branches:
+      - main
+    paths:
+      - 'docs-v2/pages/**/*.mdx'
+
+jobs:
+  validate-links:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: docs-v2
+
+    steps:
+      - name: Checkout Code
+        uses: actions/[email protected]
+        with:
+          # Fetch full history for checking diffs
+          fetch-depth: 0
+
+      - uses: pnpm/[email protected]
+        with:
+          version: 9.14.2
+
+      - name: Get pnpm store directory
+        id: pnpm-cache
+        run: |
+          echo "pnpm_cache_dir=$(pnpm store path)" >> $GITHUB_OUTPUT
+
+      - uses: actions/cache@v4
+        name: Setup pnpm cache
+        with:
+          path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
+
+      - name: Setup Node Env
+        uses: actions/[email protected]
+        with:
+          node-version: 18
+          registry-url: https://registry.npmjs.org/
+          cache: 'pnpm'
+
+      - name: Install dependencies
+        run: pnpm install -r
+
+      - name: Run link validator
+        run: node validate-mdx-links.mjs
+        env:
+          DEBUG: ${{ vars.DEBUG }}