MAINT: Simplify optimizers

[derb12]

Description

This PR simplifies optimizer-type methods by filtering based on the required parameters rather than on modules. The benefit is more granular filtering of methods, better error messages when methods are not supported by the optimizing method, and now optimizers can also be implemented as ND mixins.

The granular filtering allows optimize_extended_range to use beads and jbcd as methods, addressing issue #64.

Type of Pull Request

• Bug Fix
• New Feature
• Miscellaneous Changes (refactor, code improvements, etc.)
• Documentation or Example Programs

Pull Request Checklist

• New code and/or documentation is valid for use with the BSD 3-clause license.
• New code is fully documented with docstrings that follow Numpy style,
  if applicable.
• New code follows PEP 8 standards as closely as possible, if applicable.
• Added/updated tests and ensured they pass locally, if applicable.
• Verified that documentation builds locally, if applicable.