Add automated markdown file link check (#17)

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

@@ -0,0 +1,19 @@
+#
+# This source file is part of the Stanford Spezi open source project
+#
+# SPDX-FileCopyrightText: 2023 Stanford University and the project authors (see CONTRIBUTORS.md)
+#
+# SPDX-License-Identifier: MIT
+#
+
+name: Monthly Markdown Link Check
+
+on:
+  # Runs at midnight on the first of every month
+  schedule:
+    - cron: "0 0 1 * *"
+
+jobs:
+  markdown_link_check:
+    name: Markdown Link Check
+    uses: StanfordBDHG/.github/.github/workflows/markdown-link-check.yml@v2

.github/workflows/pull_request.yml

@@ -19,3 +19,6 @@ jobs:
   swiftlint:
     name: SwiftLint
     uses: StanfordSpezi/.github/.github/workflows/swiftlint.yml@v2
+  markdown_link_check:
+    name: Markdown Link Check
+    uses: StanfordBDHG/.github/.github/workflows/markdown-link-check.yml@v2

README.md

@@ -39,7 +39,7 @@ You need to add the Spezi Questionnaire Swift package to
 [Swift package](https://developer.apple.com/documentation/xcode/creating-a-standalone-swift-package-with-xcode#Add-a-dependency-on-another-Swift-package).
 
 > [!IMPORTANT]
-> If your application is not yet configured to use Spezi, follow the [Spezi setup article](https://swiftpackageindex.com/stanfordspezi/spezi/documentation/spezi/setup) setup the core Spezi infrastructure.
+> If your application is not yet configured to use Spezi, follow the [Spezi setup article](https://swiftpackageindex.com/stanfordspezi/spezi/documentation/spezi/initial-setup) setup the core Spezi infrastructure.
 
 ### 2. Ensure that your Standard Conforms to the [`QuestionnaireConstraint`](https://swiftpackageindex.com/stanfordspezi/speziquestionnaire/documentation/speziquestionnaire/questionnaireconstraint) Protocol
 

Sources/SpeziQuestionnaire/SpeziQuestionnaire.docc/SpeziQuestionnaire.md

@@ -34,7 +34,7 @@ You need to add the Spezi Questionnaire Swift package to
 [your app in Xcode](https://developer.apple.com/documentation/xcode/adding-package-dependencies-to-your-app#) or
 [Swift package](https://developer.apple.com/documentation/xcode/creating-a-standalone-swift-package-with-xcode#Add-a-dependency-on-another-Swift-package).
 
-> Important: If your application is not yet configured to use Spezi, follow the [Spezi setup article](https://swiftpackageindex.com/stanfordspezi/spezi/documentation/spezi/setup) and set the core Spezi infrastructure.
+> Important: If your application is not yet configured to use Spezi, follow the [Spezi setup article](https://swiftpackageindex.com/stanfordspezi/spezi/documentation/spezi/initial-setup) and set the core Spezi infrastructure.
 
 ### 2. Ensure that your Standard Conforms to the QuestionnaireConstraint Protocol