Add spatially variable spreading rates at ridges

[danieldouglas92]

Address Issue #533. Adds spatial variation for spreading centers in the half space temperature feature for oceanic plates. This requires a new parsing function that I called value_at_array that allows worldbuilder to extract an array of size N for a single value. This was done to prepare for new functionality that will be added to address #534. This will allow the user to specify the spreading rate at past times as well as specify spatial variations.

[codecov]

Codecov Report

Attention: 12 lines in your changes are missing coverage. Please review.

Comparison is base (684b28a) 93.11% compared to head (97ea335) 92.50%.
Report is 23 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #617      +/-   ##
==========================================
- Coverage   93.11%   92.50%   -0.62%     
==========================================
  Files          92       92              
  Lines        6334     6457     +123     
==========================================
+ Hits         5898     5973      +75     
- Misses        436      484      +48     

Files	Coverage Δ
source/world_builder/features/continental_plate.cc	100.00% <100.00%> (ø)
...es/continental_plate_models/composition/uniform.cc	100.00% <100.00%> (ø)
...plate_models/grains/random_uniform_distribution.cc	98.63% <100.00%> (ø)
...eatures/continental_plate_models/grains/uniform.cc	98.03% <100.00%> (ø)
.../continental_plate_models/temperature/adiabatic.cc	100.00% <100.00%> (ø)
...res/continental_plate_models/temperature/linear.cc	100.00% <100.00%> (ø)
...es/continental_plate_models/temperature/uniform.cc	100.00% <100.00%> (ø)
source/world_builder/features/mantle_layer.cc	100.00% <100.00%> (ø)
...eatures/mantle_layer_models/composition/uniform.cc	100.00% <100.00%> (ø)
...layer_models/grains/random_uniform_distribution.cc	98.63% <100.00%> (ø)
... and 18 more

... and 3 files with indirect coverage changes

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[github-actions]

Benchmark	Main	Feature	Difference (99.9% CI)
Slab interpolation simple none	1.011 ± 0.003 (s=438)	1.008 ± 0.004 (s=456)	-0.4% .. -0.2%
Slab interpolation curved simple none	1.016 ± 0.004 (s=441)	1.014 ± 0.005 (s=448)	-0.3% .. -0.1%
Spherical slab interpolation simple none	1.167 ± 0.008 (s=400)	1.166 ± 0.009 (s=374)	-0.2% .. +0.1%
Slab interpolation simple curved CMS	1.055 ± 0.004 (s=421)	1.058 ± 0.004 (s=433)	+0.2% .. +0.3%
Spherical slab interpolation simple CMS	1.549 ± 0.009 (s=315)	1.546 ± 0.009 (s=269)	-0.4% .. -0.1%
Spherical fault interpolation simple none	1.168 ± 0.006 (s=373)	1.168 ± 0.007 (s=400)	-0.2% .. +0.1%
Cartesian min max surface	2.311 ± 0.018 (s=200)	2.307 ± 0.028 (s=192)	-0.5% .. +0.2%
Spherical min max surface	7.198 ± 0.022 (s=62)	7.188 ± 0.032 (s=66)	-0.4% .. +0.1%

[tjhei]

Your PR contains many different kinds of unrelated changes and also reintroduces typos in a few places. It might make sense to review this PR carefully and maybe split it into several PRs.

[tjhei]

Typos

[tjhei]

I think this means that you generated the output with an older version. Can you rebase to the current main and rerun the tests to generate a new version of this file?