[Website] New viz.: Cavitation and interface dynamics

[sbryngelson]

Add visualization of 3D cavitation/bubble dynamics and interface dynamics cases from Frontier to website mflowcode.github.io

[sbryngelson]

@wilfonba I think we want some Frontier examples, even if they aren't hyper pretty or have amazing videos, to the website. I think you have some of these from proposal submissions?

[wilfonba]

Yeah. I'll add it to my list.