Add Sub-Particle Scale (SPS) Turbulence Model

[LasNikas]

• [ ] - bad performance
• [ ] - docs missing
• [ ] - tests missing

[codecov[bot]]

Codecov Report

:x: Patch coverage is 22.22222% with 91 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 64.24%. Comparing base (f1af783) to head (fd606fd).

Files with missing lines	Patch %	Lines
src/schemes/fluid/turbulence_models.jl	14.95%	91 Missing :warning:

:exclamation: There is a different number of reports uploaded between BASE (f1af783) and HEAD (fd606fd). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (f1af783)	HEAD (fd606fd)
total	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #999       +/-   ##
===========================================
- Coverage   89.59%   64.24%   -25.35%     
===========================================
  Files         120      121        +1     
  Lines        8579     8672       +93     
===========================================
- Hits         7686     5571     -2115     
- Misses        893     3101     +2208     

Flag	Coverage Δ
total	?
unit	64.24% <22.22%> (-0.59%)	:arrow_down:

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