Curved gsd

[mthran]

Description

This PR introduces several small changes, namely:

• Implementation of AppendMicrostate for 3d spherical points, 2d hyperbolic points, and 2d oriented hyperbolic points.
• The distance function for Spherical<4> is modified to clip the argument to the range [-1.0,1.0]
• Implementation of a new function from_versor for Spherical<4>
• More efficient LocalTrial for Spherical<4> based on exponential mapping of manifold.

Motivation and context

These changes are largely motivated by my own use of hoomd-rs to simulate bodies in curved space.

• AppendMicrostate is necessary to save trajectories in curved space.
• The distance function for Spherical<4> needed to be clipped because floating point errors made antipodal points return a distance of Nan instead of pi
• The from_versor function lends itself to a natural and efficient representation of 3-sphere points.

How has this been tested?

This PR includes unit test functions for all of the new functions. I have also been using this branch to run production simulations and have verified that the functions work as expected. For example, thermodynamic quantities calculated from the Spherical<4> Monte Carlo methods reproduce literature values given by older simulation results.

Checklist:

• [ X ] I have reviewed the Contributor Guidelines.
• [ X ] I agree with the terms of the hoomd-rs Contributor Agreement.
• [ X ] My name is on the list of contributors (doc/src/credits.md) in the pull request source branch.
• I have summarized these changes in CHANGELOG.md following the established format.