Support `suppressOptions` argument to XH.confirm() and XH.alert()

[lbwexler]

FROM ATM

WDYT about adding an option to XH.confirm() that would include a standardized “don’t ask me again for this session” checkbox?
I’m imagining that arg could take a dev-defined key (arbitrary string) - something like suppressForSessionKey or snoozeForSessionKey as a cuter option.
Another option would be to take a PersistOptions object that would also support a more permanent snooze option via prefs or localStorage, but that gets a bit more complicated with a need to spec a suitable prompt and all that.

FROM LEE

maybe a suppress: SuppressOpts with

key: string
type?: 'session'|'localStorage' (default session)
label?: string (default something standard, sensitive to type)