[Feature request] Sequential combo 'flavor'

[Intuos5]

By default, combos are evaluated based on whether a combination of keys is held within the timeout-ms threshold. This, however, means that the order in which the keys were pressed does not matter. I would like to request a sequential combo flavor, in which the order of the keystrokes also matters for a combo activation. This is interesting in combination with hold_taps and layer changing behaviors, because these require you to hold down a key. Pressing the next key then activates the combo, but not vice versa (e.g. key 1 followed by 2 does activate a combo, but 1 followed by 2 does not). With homerow mods, this sequential combo could also be used to prevent certain specific accidental chorded (rolled) capitalisations, the negation of which can than enable a further reduction of require-prior-idle-ms and/ or the tapping-term-ms.

[caksoylar]

For reference, QMK has a COMBO_MUST_PRESS_IN_ORDER_PER_COMBO option to do this: https://docs.qmk.fm/#/feature_combo?id=per-combo-timing-holding-tapping-and-key-press-order