VisBug should render in `:top-layer`

[FortyGazelle700]

VisBug should render in `:top-layer`

[argyleink]

tooootally.

visbug needs to exist on :top-layer too so it can overlay these new elements that inhabit the top layer.

[hchiam]

i had a quick skim over https://stackoverflow.com/questions/75509725/place-an-element-above-the-top-layer and some of the links there.

HMW put VisBug in the :top-layer?

• somehow inject elements into the :top-layer?
• put things inside an invisible <dialog>, since <dialog>s can be stacked?

[argyleink]

my current thinking is: project needs to move to / experiment with popover, which will get put into the top layer, can stack on each other, etc. there's a polyfill for it too https://github.com/oddbird/popover-polyfill

[argyleink]

after that, it'd be nice to move to anchor() positioning too, but that spec is less stable and adopting it now would likely be premature.