Feat/Req: Keydown/Keyup Event Handling for Keybinder Function

[MnkyArts]

Would love if we could have both Keydown and Keyup for the Serverside Keybinder. This would allow us to create more interactive and dynamic experiences by reacting immediately when a key is pressed and also when it is released.

Here maybe an idea how it could look:

const Keybinder = Rebar.useKeybinder();

Keybinder.on(75, 'keydown', (player) => {
    console.log('pressed k down');
});

Keybinder.on(75, 'keyup', (player) => {
    console.log('pressed k up');
});