Function process_triggers 

pub fn process_triggers<const B: usize, const E: usize, const A: usize>(
    state: &mut PresetState<B, E>,
    preset: &Preset<B, E, A>,
    status: u8,
    data1: u8,
    data2: u8,
) -> TriggerResult

Process incoming MIDI against preset triggers. Updates button state directly.