ENH: CP and Thrust Eccentricity Effects Generate Roll Moment

[MateusStano]

Pull request type

• [x] Code changes (bugfix, features)

Checklist

• [x] Tests for the changes have been added (if needed)
• [x] Docs have been reviewed and added / updated
• [x] Lint (black rocketpy/ tests/) has passed locally
• [x] All tests (pytest tests -m slow --runslow) have passed locally
• [x] CHANGELOG.md has been updated (if relevant)

Current behavior

CP eccentricities did not generate moment on the rocket's center axis (roll moment M3) and thrust eccentricity was not included in u_dot_generalized

New behavior

Roll moment is calculated properly and thrust eccentricity is included in u_dot_generalized

Breaking change

• [ ] Yes
• [x] No

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 73.60%. Comparing base (158d1ca) to head (6af67ac). Report is 1 commits behind head on develop.

:exclamation: Current head 6af67ac differs from pull request most recent head 240585b

Please upload reports for the commit 240585b to get more accurate results.

Files	Patch %	Lines
rocketpy/simulation/flight.py	80.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #617 +/- ## =========================================== - Coverage 73.60% 73.60% -0.01% =========================================== Files 70 70 Lines 10290 10292 +2 =========================================== + Hits 7574 7575 +1 - Misses 2716 2717 +1 ```

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[MateusStano]

Send like r1 and r2 are aligned to the global coordinate system (the earth) but the x and y excentricity should be aligned to the local (rocket) coordinate system.

Right now I understand you are assuming R1 is always parallel to x_excentricity, right?

R1, R2, and R3 are described in the rocket coordinate system from what I understand

What I did here is in accordance with what the code was doing before, I am not assuming anything different. But yes, I believe the R1 was assumed to be parallel to x