ci: added a link checker for markdown files (#16)

* ci: added a link checker for markdown files

* update filepath

Author: twishabansal

.github/workflows/markdown-checks.yml

@@ -0,0 +1,33 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Lint Markdown
+
+on:
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  link-check:
+    name: Run link check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Link Checker
+        uses: lycheeverse/[email protected]
+        with:
+          # There is no security token. So, it would fail on any links which aren't public.
+          args: "--verbose --no-progress **/*.md"