Small refactor of the src files

[abelsiqueira]

No code is being changed.

• Split src/JSOSuite.jl into other files.
• Rename following kebab-case convention (which we don't have written anywhere as default, and hardly use it, but let's hope we change that as well in the future).

[codecov[bot]]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Files	Coverage Δ
src/JSOSuite.jl	100.00% <ø> (+5.88%)	:arrow_up:
src/bmark-solvers.jl	100.00% <100.00%> (ø)
src/feasible-point.jl	100.00% <100.00%> (ø)
src/load-solvers.jl	100.00% <100.00%> (ø)
src/solve-model.jl	81.57% <81.57%> (ø)

:loudspeaker: Thoughts on this report? Let us know!.

[abelsiqueira]

Thanks for the review