Breaking changes targeting v0.14

[mikeingold]

Several significant breaking changes are planned for this major version. Some of these changes may be implemented in sub-branches and then merged into this one for ease of review.

Plans

Branch: breaking-rules

• Rename IntegrationAlgorithm to IntegrationRule, change references from "algorithm", "settings", etc to "rule"

Others

• Convert FP to a keyword argument.
  • Figure out how to ensure clean pass-through of arguments from alias functions, e.g. lineintegral -> integral -> _integral?
• Add "Why Specialized" lines to each specialization source file: why does this geometry require specialized methods vs the generalized ones?
• Remove jacobian, derivative, and unitdirection from exports -- these originated when the package's trajectory was less clear, and behave more like interesting internal tools

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.35%. Comparing base (8d5f81a) to head (b2f7187).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #80   +/-   ##
=======================================
  Coverage   90.35%   90.35%           
=======================================
  Files          16       16           
  Lines         311      311           
=======================================
  Hits          281      281           
  Misses         30       30           

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