confirm all plugins

[jdx]

it's a bit annoying if you have a bunch of plugins to install since mise keeps prompting. We should have an extra button in addition to "Yes/No" for "All" to stop prompting:

I think this will require first adding the feature to demand.

[roele]

@jdx Opened https://github.com/jdx/demand/issues/53 to address this. I guess a new Dialog component is the best option to not break backwards compatibility. Confirm can be deprecated at some point as Dialog will provide more functionality.