OSCAR style guide

[pbelmans]

We are aware of the Julia style guide and (largely) follow it, but it's probably a good idea to take a look at the OSCAR style guide.

Based on these, I wonder whether the following should be considered:

• have a DimensionVector type, and likewise a StabilityParameter type? the latter would also work with things more general than integers, we should at least allow rational numbers? it's a though one, because in Sage I would argue against it, but maybe in Julia it makes sense, as there's so little overhead?
• why Teleman_bound_onstratum and not Teleman_bound_on_stratum?
• there are spurious / missing new lines everywhere: this should be more consistent
• it should be n_vertices (and be an alias for number_of_vertices)

Related to this I have the following questions about the structure of the code:

• maybe Chow-related things should be put in chow.jl, given how hard it is to navigate moduli.jl given its size
• for clarity, shouldn't there be a quiver.jl file with things that are currently in QuiverTools.jl and QuiverTools-types.jl?

There might be more to come as I ponder these questions a bit more.