Input actions not bound to single gamepad

[VnceGd]

Issue

Player controls are not discrete, meaning that Player 2 is able to duplicate actions meant to be performed only by Player 1 and vice versa.

Proposal

We will update our scripts to use Unity's new Input System.
The old system listens for button presses through the Update() function, and we will replace these with Input Actions which have unique bindings and listeners.