Extend the SystemStructure tutorial and fix minor bugs

[1-Bart-1]

• Fix the problem where v_wind couldn't be zero
• Fix the issue where the positions could not be negative
• Fix Update scalar parameters after deserializing the model SymbolicAWEModels.jl#17
• Extend the SystemStructure tutorial

[codecov]

Codecov Report

Attention: Patch coverage is 97.56098% with 3 lines in your changes missing coverage. Please review.

Project coverage is 88.15%. Comparing base (2563094) to head (efe89f8).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
src/symbolic_awe_model.jl	93.61%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     OpenSourceAWE/KiteModels.jl#236      +/-   ##
==========================================
+ Coverage   86.40%   88.15%   +1.75%     
==========================================
  Files           9        9              
  Lines        2104     2103       -1     
==========================================
+ Hits         1818     1854      +36     
+ Misses        286      249      -37     

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[1-Bart-1]

Merged in SymbolicAWEModels.jl