Show methods display information about the advection scheme(s)

[navidcy]

Closes #3534.

After this PR:

julia> using Oceananigans

julia> model = NonhydrostaticModel(grid = RectilinearGrid(size=(2, 3, 4), extent=(1, 1, 1)))
NonhydrostaticModel{CPU, RectilinearGrid}(time = 0 seconds, iteration = 0)
├── grid: 2×3×4 RectilinearGrid{Float64, Periodic, Periodic, Bounded} on CPU with 3×3×3 halo
├── timestepper: QuasiAdamsBashforth2TimeStepper
├── advection scheme: Centered reconstruction order 2
├── tracers: ()
├── closure: Nothing
├── buoyancy: Nothing
└── coriolis: Nothing

julia> model = ShallowWaterModel(grid = RectilinearGrid(size = (4, 4), extent = (1, 1), topology=(Periodic, Bounded, Flat)), gravitational_acceleration = 1)
┌ Warning: The ShallowWaterModel is currently unvalidated, subject to change, and should not be used for scientific research without adequate validation.
└ @ Oceananigans.Models.ShallowWaterModels ~/Research/OC8.jl/src/Models/ShallowWaterModels/shallow_water_model.jl:129
ShallowWaterModel{typename(CPU), Float64}(time = 0 seconds, iteration = 0) 
├── grid: 4×4×1 RectilinearGrid{Float64, Periodic, Bounded, Flat} on CPU with 3×3×0 halo
├── timestepper: RungeKutta3TimeStepper
├── advection scheme: 
│   ├── momentum: Upwind Biased reconstruction order 5
│   └── mass: WENO reconstruction order 5
├── tracers: ()
└── coriolis: Nothing

[glwagner]

That looks nice!

[glwagner]

I guess the hydrostatic model already shows the advection scheme?

[navidcy]

I guess the hydrostatic model already shows the advection scheme?

#3504