Implement `WidthHeuristics` to set maximum width of code lines

[eureka-cpu]

This configuration can be found under heuristics::WidthHeuristics with some helpful methods.

[kayagokalp]

I think this is already implemented for fmt-v2. If that is the case maybe we can close this one.

[eureka-cpu]

If it has we should add tests that confirm this and let that PR close this issue

[eureka-cpu]

#2338 closed this by adding a width_heuristics field to Shape