aerodynamic_analysis (schueltke): added lili documentation

Description

• referenced LILI User documentation
• corrected typo

Related Issue(s)

N.A

Other Changes

• renamed img folder to figures (as in other modules)

Screenshots/Logs

N.A

Testing Instructions

1. checkout this branch
2. Open user documentation of aerodynamic analysis in VS_Code and check if the links are working

Developer Checklist

• Code has been tested locally and/or in pipeline.
• (if applicable) documentation updated.
• Merge conflicts resolved with the target branch.

Additional Notes

N.A