feat: Add Pr Check For Broken Links (hiero-ledger#1206)

Signed-off-by: aceppaluni <[email protected]>

Author: aceppaluni

.github/workflows/pr-check-broken-links.yml

@@ -0,0 +1,29 @@
+name: PR Check – Broken Markdown Links
+
+on:
+  pull_request:
+    paths:
+      - '**/*.md'
+
+permissions:
+  contents: read
+
+jobs:
+  pr-check-broken-links:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Harden runner (audit outbound calls)
+        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
+        with:
+          egress-policy: audit
+
+      - name: Checkout repository
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+
+      - name: Check Markdown links
+        uses: tcort/github-action-markdown-link-check@e7c7a18363c842693fadde5d41a3bd3573a7a225 # v1.1.2
+        with:
+          use-quiet-mode: 'yes'
+          check-modified-files-only: 'yes'
+          base-branch: 'main'

CHANGELOG.md

@@ -9,6 +9,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 
 
 ### Added
+- Added a GitHub Actions workflow to validate broken Markdown links in pull requests.
 - Added method chaining examples to the developer training guide (`docs/sdk_developers/training/coding_token_transactions.md`) (#1194)
 - examples/mypy.ini for stricter type checking in example scripts
 - Added a GitHub Actions workflow that reminds contributors to link pull requests to issues.