Add help for all Durable Functions cmdlets

[AnatoliB]

Resolves #92

Important note to reviewers:

The following content was auto-generated by platyPS based on the actual module content:

• the cmdlet names;
• the SYNTAX sections;
• the parameter names;
• the detailed technical information on parameters in the yaml blocks (e.g. type, default value, optional vs. mandatory, pipeline input, etc.);
• the CommonParameters sections.

There is no need to carefully review each and every piece of this data, as platyPS is doing a good job. Just a quick sanity check glance is enough.

[Copilot]

Pull Request Overview

This PR introduces external help documentation for all Durable Functions cmdlets and updates the build process to generate the corresponding MAML files. Key changes include the addition of markdown help files for each cmdlet, minor adjustments to inline documentation in the module file, and an update to build.ps1 for help file generation.

Reviewed Changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated no comments.

File	Description
src/Help/*.md	New markdown documentation files for each Durable Functions cmdlet with usage examples and parameter details
src/AzureFunctions.PowerShell.Durable.SDK.psm1	Removal of deprecated commented blocks to clean up inline documentation
build.ps1	Enhancement to generate external help files with PlatyPS, adding installation and generation steps

Comments suppressed due to low confidence (2)

src/Help/Suspend-DurableOrchestration.md:2

• Consider standardizing the naming convention for the external help file across all cmdlet help files. For example, align the naming with 'AzureFunctions.PowerShell.Durable.SDK.dll-Help.xml' if that is the intended format.

external help file: AzureFunctions.PowerShell.Durable.SDK-help.xml

src/AzureFunctions.PowerShell.Durable.SDK.psm1:69

• [nitpick] If the commented-out documentation for Start-DurableOrchestration and Send-DurableExternalEvent is no longer relevant, consider removing it entirely to reduce clutter and improve code maintainability.

    Invoke-RestMethod -Uri $requestUrl

[andystaples]

Left a question and a non-blocking clarification request

[andystaples]

lgtm