Expose the `confirm` component to plugin developers

[hankertrix]

yazi --debug output

N/A

Please describe the problem you're trying to solve

The confirm component has been implemented since Yazi v0.3.1, so I think it's a good time to expose it to plugin developers.

Would you be willing to contribute this feature?

• [X] Yes, I'll give it a shot

Describe the solution you'd like

Just a Lua API to show the confirm component.

Additional context

It seems like the API is marked with a TODO for a redesign. Maybe now that the component has somewhat stabilised, it may be easier to design the API for it.

Checklist

• [X] I have searched the existing issues/discussions
• [X] The latest nightly build doesn't already have this feature