feat: Use {cli} for console printing

[gadenbuie]

• Use cli for command line printing
• cli functions are called through wrappers that respect the shinylive.quiet global option and no-op if quiet = TRUE.
• export(verbose=) is deprecated in favor of quiet
• assets_info() gains a quiet argument
• Overly verbose file-copying messages are now suppressed in export().

[schloerke]

Thank you!

Just a cosmetic change to move verbose= (which is already after the ...) to the end so users are less tempted.