Support special window mode (desktop full-screen, full-screen, etc.)

[w568w]

I am working on a cross-platform screenshot app, and found capy-ui really handy. It will be very useful to allow building full-screen applications with capy-ui.

For a full-screen app (or game), there are 2 different modes:

• Desktop Full-screen: A borderless full-screen window on desktop;
• Full-screen: An exclusive full-screen window.

As far as I know, it is available in most platforms.

For full-screen and some other window features (e.g., HiDPI support, decoration toggling), I am willing to contribute.

[zenith391]

Sure, I'll add that feature in a few days time.

[zenith391]

Implemented in 6f9228f4c7e60fea07223bb1df836b8250b29ea7

[w568w]

Wow it progressed so fast, thank you for your excellent work! :smile: @zenith391

If you still have some TODOs unplanned or unfinished, please don't hesitate to tell me. I am very willing to contribute. I can test on both Windows and Linux (Wayland).