Method AddKeyAnalogEvent

Queue a new key down/up event. - ImGuiKey key: Translated key (as in, generally ImGuiKey_A matches the key end-user would use to emit an 'A' character) - bool down: Is the key down? use false to signify a key release. - float analog_value: 0.0f..1.0f IMPORTANT: THIS FUNCTION AND OTHER "ADD" GRABS THE CONTEXT FROM OUR INSTANCE. WE NEED TO ENSURE THAT ALL FUNCTION CALLS ARE FULFILLING