Refactor and extend input management

[IAmNotHanni]

Is your feature request related to a problem?

The input code requires further refactoring.

Description

• We should support more than one gamepad
• Joystick support should be implemented and multiple joysticks should be supported
• Improve reference page about input
• We must handle plugging a device in or out in a robust way
• Extensive testing is required with multiple joystick/gamepad devices

Alternatives

none

Affected Code

The input code

Operating System

all

Additional Context

none