Add an option for a quasi-static model

[1-Bart-1]

Add an option in settings for a quasi-static model, where the tether points and the pulleys will be modeled with acc = 0.
Also fix the damping values so that they work for both the quasi static model, and a 6-segment tether.

[codecov]

Codecov Report

Attention: Patch coverage is 95.23810% with 1 line in your changes missing coverage. Please review.

Project coverage is 91.28%. Comparing base (041226e) to head (70f3cde).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ram_air_kite.jl	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #121      +/-   ##
==========================================
- Coverage   91.29%   91.28%   -0.02%     
==========================================
  Files           7        7              
  Lines        1620     1617       -3     
==========================================
- Hits         1479     1476       -3     
  Misses        141      141              

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