Use new KVector Unitful extension to simplify differential

[mikeingold]

Changes

• Increases minimum compat version of CliffordNumbers.jl dependency to v0.1.9
• Uses CliffordNumbers.jl's new Unitful extension, converting Meshes.Vec to Unitful.Quantity{KVector} which now support unit-aware wedge products
• Add a new utility method _units(::Meshes.Vec)

Note: started new branch after difficulty git rebase-ing in #114.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.81%. Comparing base (05238b2) to head (8105b71).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #130      +/-   ##
==========================================
+ Coverage   95.26%   95.81%   +0.55%     
==========================================
  Files          17       17              
  Lines         380      287      -93     
==========================================
- Hits          362      275      -87     
+ Misses         18       12       -6     

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[github-actions]

Benchmark Results

	main	8105b71...	main/8105b716d3f24d...
Differentials/Differential	0.249 ± 0.003 μs	0.241 ± 0.0011 μs	1.03
Differentials/Jacobian	0.206 ± 0.001 μs	0.206 ± 0.0001 μs	1
Integrals/Meshes.BezierCurve/Scalar GaussKronrod	22 ± 0.075 ms	23 ± 0.075 ms	0.958
Integrals/Meshes.BezierCurve/Scalar GaussLegendre	21.1 ± 0.062 ms	22 ± 0.054 ms	0.961
Integrals/Meshes.BezierCurve/Scalar HAdaptiveCubature	22.2 ± 0.03 ms	23.2 ± 0.08 ms	0.956
Integrals/Meshes.BezierCurve/Vector GaussKronrod	22 ± 0.043 ms	23 ± 0.095 ms	0.957
Integrals/Meshes.BezierCurve/Vector GaussLegendre	21.1 ± 0.033 ms	22 ± 0.043 ms	0.957
Integrals/Meshes.BezierCurve/Vector HAdaptiveCubature	22.2 ± 0.041 ms	23.2 ± 0.079 ms	0.957
Integrals/Meshes.Segment/Scalar GaussKronrod	1.2 ± 0.008 μs	1.26 ± 0.005 μs	0.95
Integrals/Meshes.Segment/Scalar GaussLegendre	0.0562 ± 0.00088 ms	0.0549 ± 0.00079 ms	1.02
Integrals/Meshes.Segment/Scalar HAdaptiveCubature	4.57 ± 0.064 μs	4.57 ± 0.053 μs	0.998
Integrals/Meshes.Segment/Vector GaussKronrod	3.43 ± 0.064 μs	3.39 ± 0.058 μs	1.01
Integrals/Meshes.Segment/Vector GaussLegendre	0.0663 ± 0.00083 ms	0.0677 ± 0.00099 ms	0.98
Integrals/Meshes.Segment/Vector HAdaptiveCubature	7.48 ± 0.14 μs	7.46 ± 0.11 μs	1
Integrals/Meshes.Sphere/Scalar GaussKronrod	0.087 ± 0.00046 ms	0.0882 ± 0.0019 ms	0.986
Integrals/Meshes.Sphere/Scalar GaussLegendre	12.3 ± 0.092 ms	12 ± 0.13 ms	1.03
Integrals/Meshes.Sphere/Scalar HAdaptiveCubature	0.0635 ± 0.00022 ms	0.0631 ± 0.00031 ms	1.01
Integrals/Meshes.Sphere/Vector GaussKronrod	0.12 ± 0.00095 ms	0.119 ± 0.001 ms	1.01
Integrals/Meshes.Sphere/Vector GaussLegendre	13.7 ± 0.4 ms	13.5 ± 0.46 ms	1.01
Integrals/Meshes.Sphere/Vector HAdaptiveCubature	0.113 ± 0.0014 ms	0.113 ± 0.0012 ms	1
time_to_load	1.66 ± 0.021 s	1.65 ± 0.0077 s	1.01

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).

[JoshuaLampert]

LGTM!