Multiple KeyTypes on the same key

[qwelyt]

Having OnHold and DoubleTap is all nice and dandy. But I should not have to choose between them! I should be able to have both on the same key.

I should be able to say

(
   KeyCode(A), 
   DoubleTap(KeyCode(Esc), 100ms), 
   OnHold(KeyCode(Shift), 100ms), 
   TapHold(Function(...), 100ms, 100ms),
   DoubleTapHold(LayerMo(4), 100ms, 100ms, 50ms)

And that is ONE key. I should be able to do all the things on one and the same key without there being any problems. So this key for example would write A when pressed normally. If pressed twice within 100ms it would produce Esc. If held for 100ms it would produce Shift. You get far by just allowing this.
But I want more. TapHold would be press-release-press-hold, and that would execute a Function here.
DoubleTapHold is the same thing, but press-release-press-release-press-hold. And that would move us to to layer+4.

This allows one key to suddenly become 5 keys.

On top of this we have Chording and Combo that needs to be handled somehow. But all types should be allowed, always.