Add response type and callback support to CommandDialog and StepperCommandDialog

[Copilot]

Summary

@cratis/arc.react v19.11.0 introduced typed command responses and result callbacks to CommandForm. This change propagates that capability through CommandDialog and StepperCommandDialog.

Added

• TResponse generic parameter to CommandDialog<TCommand, TResponse> and StepperCommandDialog<TCommand, TResponse> (defaults to object)
• Five result callback props mirroring CommandResult API:
  • onSuccess(response: TResponse) - invoked on successful execution with typed response
  • onFailed(commandResult: CommandResult<TResponse>) - invoked on any failure
  • onException(messages: string[], stackTrace: string) - invoked when command throws
  • onUnauthorized() - invoked when authorization fails
  • onValidationFailure(validationResults: ValidationResult[]) - invoked on validation errors
• Storybook stories demonstrating typed response handling and callbacks
• Documentation sections covering response type handling and callback execution order

Changed

• Updated @cratis/arc packages from v19.6.9 to v19.11.0

Example usage:

type CreateProjectResponse = {
    projectId: string;
    message: string;
};

<CommandDialog<CreateProject, CreateProjectResponse>
    command={CreateProject}
    title="Create Project"
    onSuccess={(response) => {
        navigate(`/projects/${response.projectId}`);
    }}
    onValidationFailure={(errors) => {
        showNotification(errors.map(r => r.message).join(', '));
    }}
/>

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add support for specifying the response type for CommandDialog and StepperCommandDialog</issue_title>
<issue_description>With the latest version of @cratis/arc.react there is now support for specifying the response type and it also has callbacks
for the different things that can happen with a command:

https://github.com/Cratis/Arc/releases/tag/v19.11.0

We need this to be supported transiently in CommandDialog and StepperCommandDialog.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add support for specifying the response type for CommandDialog and StepperCommandDialog #52

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