[Docs]: Add an example of Dialog usage without DialogTrigger

[layershifter]

Library

React Components / v9 (@fluentui/react-components)

Describe the feature that you would like added

• DialogTrigger manages focus handling (restoration) when a Dialog gets closed
• Dialog can be used without triggers
• We need a documentation example for that case ([Bug]: After closing one Dialog can't focus on Input on already opened Dialog #27914)

Have you discussed this feature with our team

N/A

Additional context

No response

Validations

• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[miroslavstastny]

Trigger outside dialog is a good storybook example but after closing the dialog the focus goes the body.
It should go back to trigger and it should also be explicitly documented.