Left-hand and right-hand alphabet in goto_word

[HairlessVillager]

In the current version, there's only one alphabet that goto_word labels use (configure see the jump-label-alphabet in Editor Section), and it's not distinguishing between left and right hands. So it's frequent that left hand hit the keyboard twice but right hand takes no action (or the opposite).

IMO it's always a left hand key first and a right hand key second is a good practice. For example:

• ae is ❌ because a and e is both on the left part of keyboard.
• ju is ❌ because j and u is both on the right part of keyboard.
• wh is ⭕ because w is on the left and h is on the right.

I've studied Rust and read the relative source code. Now I have confidence to implement this feature.🤗