changes to SEmanifold visualization

[mnamazi1]

Checklist

• My pull request has a clear and explanatory title.
• If necessary, my code is vectorized.
• I added appropriate unit tests.
• I made sure the code passes all unit tests. (refer to comment below)
• My PR follows PEP8 guidelines. (refer to comment below)
• My PR follows geomstats coding style and API.
• My code is properly documented and I made sure the documentation renders properly. (Link)
• I linked to issues and PRs that are relevant to this PR.

Description

Changes to SE(2) and addition of SE(3) manifold visualization methods

Issue

Additional context

[codecov]

Codecov Report

Merging #1812 (4c8b129) into master (6f37453) will decrease coverage by 1.27%.
The diff coverage is 74.08%.

@@            Coverage Diff             @@
##           master    #1812      +/-   ##
==========================================
- Coverage   91.50%   90.22%   -1.27%     
==========================================
  Files         136      130       -6     
  Lines       13738    13372     -366     
==========================================
- Hits        12569    12063     -506     
- Misses       1169     1309     +140     

Flag	Coverage Δ
autograd	?
numpy	87.10% <74.08%> (-<0.01%)	⬇️
pytorch	80.53% <74.08%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
geomstats/visualization/special_euclidean.py	82.42% <74.08%> (-9.89%)	⬇️
geomstats/information_geometry/gamma.py	57.47% <0.00%> (-33.96%)	⬇️
geomstats/_backend/_common.py	75.00% <0.00%> (-25.00%)	⬇️
geomstats/geometry/hypersphere.py	81.33% <0.00%> (-6.96%)	⬇️
geomstats/learning/geodesic_regression.py	79.88% <0.00%> (-3.89%)	⬇️
geomstats/geometry/positive_reals.py	93.48% <0.00%> (-2.17%)	⬇️
geomstats/geometry/discrete_curves.py	91.38% <0.00%> (-1.32%)	⬇️
geomstats/geometry/pullback_metric.py	90.61% <0.00%> (-1.10%)	⬇️
geomstats/geometry/sasaki_metric.py	97.88% <0.00%> (-1.06%)	⬇️
geomstats/geometry/sub_riemannian_metric.py	93.14% <0.00%> (-0.98%)	⬇️
... and 12 more

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[mnamazi1]

Task Distribution:
Monsij Biswal - ported plot_geodesic for SE(2), test cases for SE(2), minor fixes, merged all code and made consistent across classes, debugging linting
Mahmoud Namazi - created working SE(3) class, ported plot_geodesic for SE(3), test cases for SE(3), adapted geodesic function for input arguments, debugging linting
Zeyu Deng - wrote vector_from_matrix function(), helped debug and test code
Karthik Suryanarayana -

[ninamiolane]

Very nice!
Correct my comments and add test functions for remaining methods, e.g. test_set_ax.

[monsij]

Code linting fails due to special_orthogonal.py which was updated later in #1799 . I can open a separate PR to fix that 😄