DOCs: Fix documentation build

[Gui-FernandesBR]

Several errors broke the documentations. I"m trying to fix it with this PR.

[Copilot]

Pull request overview

This PR fixes documentation build errors by addressing import ordering, docstring formatting, and documentation file issues.

Key Changes

• Alphabetized imports across multiple files to comply with isort requirements
• Reformatted docstring for calculate_rail_button_bending_moments method to better follow NumPy style guide conventions
• Added FlightComparator to public API exports with an __all__ definition in rocketpy/simulation/__init__.py
• Fixed indentation and file paths in RST documentation

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/unit/test_plots.py	Reordered imports alphabetically (matplotlib.animation before other imports)
rocketpy/simulation/flight.py	Moved calculate_rail_button_bending_moments method to better location and reformatted docstring to follow NumPy conventions with proper sections (Returns, Notes, Examples) and LaTeX math notation
rocketpy/simulation/init.py	Added FlightComparator import and defined __all__ list for explicit API exports
rocketpy/plots/tank_plots.py	Alphabetized imports within groups
rocketpy/plots/motor_plots.py	Alphabetized imports within groups
docs/user/flight_comparator.rst	Fixed indentation for code blocks and corrected file paths from ../data/calisto/ to ../data/rockets/calisto/, removed trailing whitespace

[codecov]

Codecov Report

❌ Patch coverage is 97.91667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.08%. Comparing base (9cf3dd4) to head (ed75036).
⚠️ Report is 25 commits behind head on develop.

Files with missing lines	Patch %	Lines
rocketpy/simulation/flight.py	97.50%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #908      +/-   ##
===========================================
+ Coverage    80.27%   81.08%   +0.81%     
===========================================
  Files          104      107       +3     
  Lines        12769    13814    +1045     
===========================================
+ Hits         10250    11201     +951     
- Misses        2519     2613      +94     

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