<Callout /> component provides a `open` property

[kecrily]

::callout{open}
#summary
Title

#content
This is a Callout component opened by default
::

[bdrtsky]

Every boolean prop default is false by design, to make it usable in MDC (it converts boolean to string, so otherwise you will have to {open=true/false} instead of just {open} )

[kecrily]

I mean open by default when passing open prop, not open by default in case without open, let me change the title.