Show workflow help (and readme?) in run form

[ahmedhamidawan]

Builds on #19591 and #19294

Screen.Recording.2025-03-04.at.1.20.53.AM.mov

The screencast also shows the readme in the run form, but the only commit 1041e00 here includes just the change where we add the workflow.help to the workflow run model.

Alternatively, to show the readme in the run form as well i also added the help and readme properties to StoredWorkflowDetailed, and then simply used useWorkflowInstance to render the readme in WorkflowAnnotation. Please let me know if either of those are incorrect models to add these properties to.

On top of that, should we even show the readme in the run form in the first place; meaning only show help here?

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