Support non binary inputs

[Apostolique]

Some work has been started with the static scroll and pointer API:

if (MouseCondition.Scrolled()) {
    someValue += MouseCondition.ScrollDelta;
}

if (MouseCondition.PointerMoved()) {
    someValue += MouseCondition.PointerDelta;
}

Perhaps it could be worth it to abstract this into a condition with an out parameter so that it can be used in a non static manner:

if (condition(out int delta)) {
    someValue += delta;
}

if (condition(out Vector2 delta)) {
    someValue += delta;
}

Or something similar.

Eventually, this could be used to map analog joystick values, triggers, etc.

[Apostolique]

Might be worth it to allow averaging the values.