v0.15.2-grid-1-beta1 — multi-controller (rebased on upstream 0.15.2)

Beta build on the new v0.15.2-grid-1 base. Adds opt-in for Xbox One (BR/EDR Bluetooth), DualShock 3, and DualSense — code is untested on hardware.

If you only use a DS4, stick with grid-1 — that one is hardware-verified. This beta is for community testers with the additional controllers.

Same feature set as the previous beta, just rebased on top of upstream 0.15.2 (firmware 22.5.0 / Atmosphère 1.11.2 support).