Add github action for links checker for markdown files

.github/workflows/lint-markdown-links-pr.yml

@@ -0,0 +1,18 @@
+name: Lint Markdown Links PR
+run-name: ${{github.event.pull_request.title}}
+on: [ pull_request ]
+jobs:
+  markdown-link-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: gaurav-nelson/github-action-markdown-link-check@v1
+        with:
+          use-quiet-mode: 'yes'
+          use-verbose-mode: 'yes'
+          config-file: '.mlc.config.json'
+          folder-path: '.'
+          max-depth: -1
+          check-modified-files-only: 'yes'
+          base-branch: ${{ github.base_ref }}

.mlc.config.json

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+{
+  "replacementPatterns": [
+    {
+      "_comment": "a replacement rule for all the in-repository references",
+      "pattern": "^/",
+      "replacement": "{{BASEURL}}/"
+    }
+  ],
+  "timeout": "20s",
+  "retryCount": 5,
+  "fallbackRetryDelay": "30s"
+}