Documentation/update tank design

Update tank_design documentation

Description

• Fixed layout issues
• Updated run command
• Deleted unnecessary warnings
• Added description of obelisk geometry

Related Issue(s)

• N/A

Other Changes

• N/A

Screenshots/Logs

Attach screenshots or log outputs if applicable.

Testing Instructions

1. Run medics serve and have a look at website

Developer Checklist

• Code has been tested locally and/or in pipeline.
• (if applicable) documentation updated.
• (if applicable) impact of new dependencies reviewed and included in project.
• Merge conflicts resolved with the target branch.

Additional Notes

Add any information reviewers should focus on, e.g., specific files, functions, or changes of interest.