chore: CHARTS-6802 Add github action to check markdown links (#69)

Author: khanguslee

.github/workflows/cron-weekly.yml

@@ -0,0 +1,10 @@
+name: Weekly job
+
+on:
+  schedule:
+    # Run every Sunday at 9AM
+    - cron: "0 9 * * 0"
+
+jobs: 
+  markdown-link-check:
+    uses: ./.github/workflows/markdown-link-check.yml

.github/workflows/main.yml

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+name: Main workflow
+
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+    branches:
+      - '**'
+
+jobs: 
+  markdown-link-check:
+    uses: ./.github/workflows/markdown-link-check.yml
+    

.github/workflows/markdown-link-check.config.json

@@ -0,0 +1,7 @@
+{
+  "ignorePatterns": [
+    {
+      "pattern": "^https?://localhost.*"
+    }
+  ]
+}

.github/workflows/markdown-link-check.yml

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+# Checks for any broken links in markdown files
+name: Check Markdown links
+
+on: workflow_call
+
+jobs:
+  check-links:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: gaurav-nelson/github-action-markdown-link-check@v1
+      with:
+        use-verbose-mode: 'yes'
+        config-file: '.github/workflows/markdown-link-check.config.json'
+