Add development documentation for the start devel and contributing, contributing to gwb index

[MFraters]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (22fb359) 93.11% compared to head (ddca8a6) 93.11%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #618   +/-   ##
=======================================
  Coverage   93.11%   93.11%           
=======================================
  Files          92       92           
  Lines        6333     6333           
=======================================
  Hits         5897     5897           
  Misses        436      436           

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[github-actions]

Benchmark	Main	Feature	Difference (99.9% CI)
Slab interpolation simple none	0.991 ± 0.011 (s=455)	0.995 ± 0.011 (s=454)	+0.1% .. +0.6%
Slab interpolation curved simple none	1.016 ± 0.004 (s=456)	1.016 ± 0.004 (s=432)	-0.1% .. +0.1%
Spherical slab interpolation simple none	1.167 ± 0.007 (s=397)	1.167 ± 0.006 (s=377)	-0.2% .. +0.1%
Slab interpolation simple curved CMS	1.057 ± 0.004 (s=441)	1.054 ± 0.003 (s=414)	-0.3% .. -0.2%
Spherical slab interpolation simple CMS	1.547 ± 0.009 (s=297)	1.545 ± 0.010 (s=288)	-0.3% .. +0.1%
Spherical fault interpolation simple none	1.170 ± 0.006 (s=399)	1.171 ± 0.006 (s=372)	-0.1% .. +0.2%
Cartesian min max surface	2.319 ± 0.019 (s=200)	2.319 ± 0.027 (s=191)	-0.3% .. +0.3%
Spherical min max surface	7.236 ± 0.036 (s=66)	7.245 ± 0.038 (s=61)	-0.2% .. +0.4%