Add WinchModel

[ufechner7]

• [x] add package WinchModels
• [x] add field wm to KPS3 and KPS4
• [x] extend the state by the fields length and v_reel_out
• [x] add field sync_speed
• [x] extend the function residual!
• [x] add reel-out test
• [x] wait for WinchModels to be registered

Fixes #23

[codecov-commenter]

Codecov Report

Merging #36 (f335ed6) into main (eaf6995) will decrease coverage by 0.00%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
- Coverage   99.10%   99.10%   -0.01%     
==========================================
  Files           3        4       +1     
  Lines         673      668       -5     
==========================================
- Hits          667      662       -5     
  Misses          6        6              

Impacted Files	Coverage Δ
src/KPS3.jl	98.50% <100.00%> (+0.03%)	:arrow_up:
src/KPS4.jl	100.00% <100.00%> (ø)
src/KiteModels.jl	98.07% <100.00%> (ø)
src/init.jl	100.00% <100.00%> (ø)

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