Setup URL checker workflow

.github/workflows/url_check.yml

@@ -0,0 +1,41 @@
+name: URL Validation
+
+on:
+  push:
+    branches:
+      - setup-urlchecker
+  pull_request:
+    branches:
+      - main
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
+  schedule:
+    - cron: '0 3 * * 0'
+  workflow_dispatch:
+    inputs:
+      git-ref:
+        description: Git Hash (Optional)
+        required: false
+
+jobs:
+  url_check:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout source
+      uses: actions/checkout@v4
+    - name: URL Checker
+      uses: urlstechie/urlchecker-action@0.0.34
+      with:
+        # A comma-separated list of file types to cover in the URL checks
+        file_types: .md,.rst,.py,.yaml
+        # Choose whether to include file with no URLs in the prints.
+        print_all: false
+        # More verbose summary at the end of a run
+        verbose: true
+        # How many times to retry a failed request (defaults to 1)
+        retry_count: 3
+        # The timeout seconds to provide to requests, defaults to 5 seconds
+        timeout: 60

README.md

@@ -1,4 +1,5 @@
 [![Documentation Status](https://app.readthedocs.org/projects/idaesplus/badge/?version=latest)](https://idaesplus.readthedocs.io/latest)
+[![URL Validation](https://github.com/idaesplus/docs/actions/workflows/url_check.yml/badge.svg?branch=main)](https://github.com/idaesplus/docs/actions/workflows/url_check.yml)
 
 # IDAES+ Documentation