* Add `IWorkflowDefinitionExporter` for workflow export functionality
Introduced `IWorkflowDefinitionExporter` interface and its implementation to export workflow definitions as JSON or ZIP archives. Simplified `Export` endpoint logic by utilizing the new exporter service. Updated package version to 3.6.1.
* Remove duplicate `ExportAsync` method from `IWorkflowDefinitionExporter` and its implementation in `WorkflowDefinitionExporter`.
* Remove deprecated test from `WorkflowDefinitionExporterTests`, regression tests are covered in `WorkflowReferenceGraphBuilderTests`.
* Update GitHub Actions workflow to support version 3.6.1 deployment
* Update src/modules/Elsa.Workflows.Management/Services/WorkflowDefinitionExporter.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Move `WorkflowDefinitionExporterRegressionTests` to separate test file for clarity
* Add `DefaultFileNameSanitizer` for sanitizing file names and update `WorkflowDefinitionExporter` to use it. Implement unit tests for the sanitizer.
* Update test assertion for exported workflow file name in `WorkflowDefinitionExporterRegressionTests`.
* Simplify file naming in `WorkflowDefinitionExporter` by removing duplicate ID from JSON file names.
* Update test/unit/Elsa.Workflows.Management.UnitTests/Services/DefaultFileNameSanitizerTests.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
