DOC: Add external module continuous integration discussion

Add discussion to reference the ITKRemoteModuleBuildTestPackageAction GitHub project for reusable CI workflows for ITK external modules.
InsightSoftwareConsortium · Nov 8, 2023 · b05ba5e · b05ba5e
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diff --git a/Documentation/docs/contributing/index.md b/Documentation/docs/contributing/index.md
@@ -374,6 +374,7 @@ ITK Git Cheatsheet <https://github.com/InsightSoftwareConsortium/ITK/blob/master
 updating_third_party.md
 data.md
 upload_binary_data.md
+module_workflows.md
 ```
 
 [ITK Git Cheatsheet]: ./GitCheatSheet.pdf

diff --git a/Documentation/docs/contributing/module_workflows.md b/Documentation/docs/contributing/module_workflows.md
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+# ITK External Module Continuous Integration
+
+The Insight Software Consortium [ITKRemoteModuleBuildTestPackageAction](https://github.com/InsightSoftwareConsortium/ITKRemoteModuleBuildTestPackageAction/blob/main/README.md) project provides reusable GitHub Actions workflows to support ITK module development.
+
+Reusable ITK workflows provide the following features across Linux, macOS, and Windows platforms:
+- Automated C++ build validation
+- Automated C++ testing
+  - Unit testing
+  - Style enforcement
+- Automated Python build validation
+- Automated Python Jupyter Notebook testing
+- Automated Python packaging and uploads
+
+ITK reusable workflows support most ITK external modules and provide CI boilerplate to minimize the development effort required of collaborators.
+
+## Example Usage
+
+It is easy to add ITK reusable workflow integration to an external module. In a file `workflow.yml` in the `.github/workflows` directory of your project, add the following specification:
+
+```yml
+name: Build, test, package
+
+on: [push,pull_request]
+
+jobs:
+  cxx-build-workflow:
+    uses: InsightSoftwareConsortium/ITKRemoteModuleBuildTestPackageAction/.github/workflows/[email protected]
+    with:
+      itk-cmake-options: '-DITK_BUILD_DEFAULT_MODULES:BOOL=OFF -DITKGroup_Core:BOOL=ON'
+
+  python-build-workflow:
+    uses: InsightSoftwareConsortium/ITKRemoteModuleBuildTestPackageAction/.github/workflows/[email protected]
+    with:
+      test-notebooks: true
+    secrets:
+      pypi_password: ${{ secrets.pypi_password }}
+```
+
+## Further Reading
+
+For more information visit README documentation at the [ITKRemoteModuleBuildTestPackageAction](https://github.com/InsightSoftwareConsortium/ITKRemoteModuleBuildTestPackageAction/blob/main/README.md#itkremotemodulebuildtestpackageaction) project.