feature: easymotion support one line match

Is your feature request related to a problem? Please describe.

When I use easymotion's l or h function for jumping, it matches a lot of jump points.
This sometimes causes the view to become stuck. And generally I only use these 2 functions for single line movement

Describe the solution you'd like

So I would like to have these two function jumps to support matching only one line
Similar to this feature in easymotion

Describe alternatives you've considered
I have two ways to implement this feature
One way is: we can add two shortcuts to trigger matching only one row, for example o l and o h
The other way is: to modify the behavior of l and h by means of configuration, for example, by having a field called easymotionJumpToOneLine: true.

Additional context

I've actually tried to implement all of the two mentioned above in my code, I'd like to hear your suggestions on which way you think would be better, if you don't have time I'd be happy to submit a pr and finally thank you for your excellent work I really like this plugin @J-Fields

The issue names no files or tests. Start by locating the existing easymotion bindings for l and h, then compare the proposed shortcuts with the configuration approach. Done means those jumps can restrict matches to a single line without breaking their current behavior.