Profile export (1D)

[RemDelaporteMathurin]

I didn't think I'd say that one day but: maybe it's time to implement txt exports in the fenicsx branch?

It would be good to have an easy export like this to visualise fields when we don't have access to Paraview

pinging @jhdark @KulaginVladimir

[RemDelaporteMathurin]

I think there are some pointers on this discourse response @Allentro