[workflow]add workflow to check link validation

.github/workflows/check-links.yaml

@@ -0,0 +1,28 @@
+name: Check Relative Links
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  check_links:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: "20"
+
+      - name: Install Markdown link checker
+        run: npm install -g markdown-link-check
+
+      - name: Check links in Markdown files
+        run: |
+          find . -name "*.md" -print0 | xargs -0 markdown-link-check --quiet --config .markdown-link-check.json

.markdown-link-check.json

@@ -0,0 +1,14 @@
+{
+  "ignorePatterns": [
+  ],
+  "replacementPatterns": [
+    {
+      "pattern": "^/",
+      "replacement": "https://solana.com/"
+    }
+  ],
+
+  "verbosity": "ERROR",
+  "httpStatusIgnore": [403],
+  "timeout": "15s"
+}