Single column SlabSeaIceModel with flexible air-ice and water-ice boundary conditions

[glwagner]

This PR (will) implement a simple example using a zero heat capacity ice model.

Closes #15

[codecov]

Codecov Report

Patch coverage: 5.91% and project coverage change: -40.18% ⚠️

Comparison is base (778779b) 66.99% compared to head (680f2cc) 26.81%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #14       +/-   ##
===========================================
- Coverage   66.99%   26.81%   -40.18%     
===========================================
  Files           2        7        +5     
  Lines         103      261      +158     
===========================================
+ Hits           69       70        +1     
- Misses         34      191      +157     

Files Changed	Coverage Δ
src/ClimaSeaIce.jl	6.66% <0.00%> (-93.34%)	⬇️
src/SlabSeaIceModels.jl	0.00% <0.00%> (ø)
...ryConditions/bottom_thermal_boundary_conditions.jl	0.00% <0.00%> (ø)
src/ThermalBoundaryConditions/boundary_fluxes.jl	0.00% <0.00%> (ø)
...ndaryConditions/top_thermal_boundary_conditions.jl	0.00% <0.00%> (ø)
src/EnthalpyMethodSeaIceModels.jl	66.66% <81.81%> (ø)
...malBoundaryConditions/ThermalBoundaryConditions.jl	100.00% <100.00%> (ø)

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[glwagner]

@jlk9 @simone-silvestri @navidcy this is ready for review.

I think we should wait on tests because the user API will continue to rapidly evolve.

Ideas for the next few PRs:

• idealized coupled ice-ocean column
• examples in docs
• forcing by fluxes from ECCO time-series with prescribed ocean