implemented DRM leasing

[alec-lefors]

Describe your PR, what does it fix/add?

#568

Is there anything you want to mention? (unchecked code, possible bugs, found problems, breaking compatibility, etc.)

literally just took sway's code and tried to make sure it at least matched what the Hyprland codebase looked like. never worked with C or C++ so please look over everything.

when starting steamvr for the first you need to decline sudo privileges, this is the same for sway and must be fixed on Steam's end

Is it ready for merging, or does it need work?

I'm seeing artifacts on the edges of the display when looking around, not a big deal.

[vaxerski]

hope you tested this

[alec-lefors]

works for me on a valve index, no config vars necessary. hyprland will ignore DRM devices completely and only pass them over to wlroots for handling. preferred display settings are chosen automatically until someone wants to implement customization in the config