splash(4) support in vt

Hello hackers!

I found an old post [1] regarding splash(4) support for vt. The
company I'm working for wants to invest some time into making the
FreeBSD boot process as shiny as possible. Can someone knowledgeable
on the topic give us some insight on where to start?

Our ultimate task is being able to render a GIF logo right from the
boot splash screen and until X session kicks in.

Thanks in advance!

[1] https://lists.freebsd.org/pipermail/freebsd-hackers/2018-September/053331.html