Add "Replace with next/prev value" keys

[NNBnh]

• In Vim the number under the cursor will increment or decrement when you hit Ctrl + A or Ctrl + X (respectively).
• Kakoune user can install kakoune-inc-dec plugin to achieve the similar feature.
• The best implementation of this feature is probably from VScode:

From "Key Bindings for Visual Studio Code":

Replace with Next Value: Ctrl + Shift + .
Replace with Previous Value: Ctrl + Shift + ,

From some Stackoverflow answers:

If I press the shortcut after highlighting an integer or float literal (16 or 5.2 for example) it subtracts 1 from it.
Strangely, Replace with Previous Value adds 1 to the value while Replace with Next Value subtracts 1.

If you use it on a boolean, it toggles between true and false.

I guess we could implement this via tree-sitter.