Contidtionally output the json files

[MFraters]

This is a follow up on #555. This moves the files and the generation location.

[github-actions]

Benchmark	Main	Feature	Difference (99.9% CI)
Slab interpolation simple none	1.024 ± 0.007 (s=419)	1.025 ± 0.004 (s=462)	-0.0% .. +0.2%
Slab interpolation curved simple none	1.026 ± 0.005 (s=449)	1.027 ± 0.002 (s=430)	-0.0% .. +0.1%
Spherical slab interpolation simple none	1.265 ± 0.004 (s=348)	1.263 ± 0.003 (s=366)	-0.2% .. -0.1%
Slab interpolation simple curved CMS	1.097 ± 0.006 (s=415)	1.099 ± 0.007 (s=407)	+0.0% .. +0.3%
Spherical slab interpolation simple CMS	1.862 ± 0.006 (s=269)	1.860 ± 0.006 (s=217)	-0.2% .. -0.0%
Spherical fault interpolation simple none	1.275 ± 0.006 (s=360)	1.273 ± 0.010 (s=349)	-0.3% .. +0.0%
Cartesian min max surface	2.385 ± 0.019 (s=172)	2.381 ± 0.015 (s=208)	-0.4% .. +0.1%
Spherical min max surface	7.350 ± 0.014 (s=68)	7.344 ± 0.013 (s=57)	-0.2% .. +0.0%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8ddab11) 93.55% compared to head (3149289) 93.55%.
Report is 19 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #562   +/-   ##
=======================================
  Coverage   93.55%   93.55%           
=======================================
  Files          92       92           
  Lines        6343     6346    +3     
=======================================
+ Hits         5934     5937    +3     
  Misses        409      409           

Files	Coverage Δ
source/gwb-dat/main.cc	100.00% <100.00%> (ø)
source/gwb-grid/main.cc	46.29% <ø> (ø)
source/world_builder/types/double.cc	100.00% <100.00%> (ø)
source/world_builder/world.cc	100.00% <100.00%> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 23c8592...3149289. Read the comment docs.