Allow website to appear within the menubar area

[blicksky]

Is your feature request related to a problem? Please describe.

Currently, the website you set to be visible with Plash has boundaries that end at the bottom of the menubar. #62 covered an issue where that boundary was below the menubar area when the menubar was hidden, but I'm curious about the possibility of showing content past that boundary when the menubar is visible. Tools such as Ice allow for the desktop background to be visible in the menubar area, as shown in the Gallery - Customize the menu bar's appearance.

Describe the solution you'd like

I'm interested in displaying information in the middle area of the menubar, but I currently can't do that with Plash because the website content can't extend above the lower edge of the menubar area. I'm aware that any region of the website that would potentially be shown there could be covered by the menubar content if it extends far enough over it, but I'm looking to do this while carefully controlling which menubar items are visible.

Describe alternatives you've considered

I've attempted to set the absolute position of website elements with a negative y value, but the content is clipped by the menubar area. I can likely do what I'm looking for with custom menubar icons using Hammerspoon or other tools, but I'd like to explore this possibility as well.

Additional context

none

[3CatSpam]

would be great for macOS Tahoe too