Feature: gyro aiming

[aabrole]

Requested by u/Chompsky___Honk and u/FyrusCarmin. Needs acceleration tuning on top of the existing aim-delta path. From Feedback Round 1.

[aabrole]

Acknowledged and on the list after the v0.2.5 feedback round: gyro deltas would feed the same aim path the right stick uses, with a sensitivity slider and a toggle.