Update shapes docs and fix typos

[jngrad]

No description provided.

[codecov]

Codecov Report

Merging #3569 into python will increase coverage by <1%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           python   #3569    +/-   ##
=======================================
+ Coverage      88%     88%   +<1%     
=======================================
  Files         524     524            
  Lines       23598   23598            
=======================================
+ Hits        20771   20772     +1     
+ Misses       2827    2826     -1

Impacted Files	Coverage Δ
...ils/include/utils/serialization/memcpy_archive.hpp	100% <ø> (ø)	⬆️
src/core/integrators/brownian_inline.hpp	90% <ø> (ø)	⬆️
src/utils/tests/triangle_functions_test.cpp	100% <ø> (ø)	⬆️
src/utils/include/utils/math/quaternion.hpp	100% <ø> (ø)	⬆️
src/core/unit_tests/random_test.hpp	91% <ø> (ø)	⬆️
src/core/cells.hpp	100% <ø> (ø)	⬆️
src/core/particle_data.cpp	96% <ø> (ø)	⬆️
...rc/utils/include/utils/math/triangle_functions.hpp	100% <ø> (ø)	⬆️

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