Input Control prefabs

[fight4dream]

Is your feature request related to a problem?

it is inconvenient to set up input actions on our own

Describe the solution you'd like

would like to have input control prefabs similar to that in the tilia sdk oculus integration
https://github.com/ExtendRealityLtd/Tilia.SDK.OculusIntegration.Unity/tree/master/Runtime/Prefabs/Input

[fight4dream]

alternatively, we can have some 'blank' action prefabs just like those in https://github.com/ExtendRealityLtd/Tilia.Input.UnityInputManager/tree/master/Runtime/Prefabs/Actions

[fight4dream]

or, add a guide as in #14