read VMEC input ZAXIS as ZAXIS_CS

[ddudt]

Resolves #1120

[f0uriest]

This looks like its swapping CC and CS, doesn't that break the expected parity and stuff? (the minus sign is in a different place?)
I think we just want to swap where the parens are?

[github-actions]

|             benchmark_name             |         dt(%)          |         dt(s)          |        t_new(s)        |        t_old(s)        | 
| -------------------------------------- | ---------------------- | ---------------------- | ---------------------- | ---------------------- |
 test_build_transform_fft_lowres         |     +1.20 +/- 8.90     | +6.33e-03 +/- 4.71e-02 |  5.35e-01 +/- 3.0e-02  |  5.29e-01 +/- 3.6e-02  |
 test_build_transform_fft_midres         |     +1.25 +/- 5.13     | +7.59e-03 +/- 3.10e-02 |  6.13e-01 +/- 1.8e-02  |  6.05e-01 +/- 2.6e-02  |
 test_build_transform_fft_highres        |     +0.62 +/- 5.95     | +6.23e-03 +/- 5.93e-02 |  1.00e+00 +/- 4.6e-02  |  9.97e-01 +/- 3.8e-02  |
 test_equilibrium_init_lowres            |     +0.87 +/- 1.87     | +3.28e-02 +/- 7.04e-02 |  3.81e+00 +/- 3.4e-02  |  3.77e+00 +/- 6.2e-02  |
 test_equilibrium_init_medres            |     -0.31 +/- 3.56     | -1.31e-02 +/- 1.53e-01 |  4.27e+00 +/- 4.4e-02  |  4.28e+00 +/- 1.5e-01  |
 test_equilibrium_init_highres           |     +0.87 +/- 1.53     | +4.91e-02 +/- 8.61e-02 |  5.69e+00 +/- 4.4e-02  |  5.64e+00 +/- 7.4e-02  |
 test_objective_compile_dshape_current   |     +0.55 +/- 0.96     | +2.10e-02 +/- 3.67e-02 |  3.84e+00 +/- 3.5e-02  |  3.82e+00 +/- 1.2e-02  |
 test_objective_compile_atf              |     +0.20 +/- 2.45     | +1.64e-02 +/- 2.02e-01 |  8.26e+00 +/- 5.5e-02  |  8.25e+00 +/- 1.9e-01  |
 test_objective_compute_dshape_current   |     +2.16 +/- 4.98     | +2.67e-05 +/- 6.15e-05 |  1.26e-03 +/- 5.2e-05  |  1.24e-03 +/- 3.2e-05  |
 test_objective_compute_atf              |     -0.08 +/- 6.47     | -3.17e-06 +/- 2.73e-04 |  4.21e-03 +/- 1.4e-04  |  4.21e-03 +/- 2.3e-04  |
 test_objective_jac_dshape_current       |     -1.15 +/- 6.07     | -4.42e-04 +/- 2.33e-03 |  3.80e-02 +/- 1.4e-03  |  3.84e-02 +/- 1.8e-03  |
 test_objective_jac_atf                  |     +1.91 +/- 2.89     | +3.52e-02 +/- 5.34e-02 |  1.88e+00 +/- 3.0e-02  |  1.85e+00 +/- 4.4e-02  |
 test_perturb_1                          |     +0.63 +/- 1.14     | +8.44e-02 +/- 1.52e-01 |  1.34e+01 +/- 7.2e-02  |  1.33e+01 +/- 1.3e-01  |
 test_perturb_2                          |     -1.40 +/- 1.78     | -2.60e-01 +/- 3.30e-01 |  1.83e+01 +/- 2.5e-01  |  1.86e+01 +/- 2.2e-01  |
 test_proximal_jac_atf                   |     -0.18 +/- 1.75     | -1.34e-02 +/- 1.28e-01 |  7.32e+00 +/- 9.7e-02  |  7.33e+00 +/- 8.4e-02  |
 test_proximal_freeb_compute             |     +0.47 +/- 1.31     | +8.42e-04 +/- 2.33e-03 |  1.78e-01 +/- 1.7e-03  |  1.78e-01 +/- 1.6e-03  |
 test_proximal_freeb_jac                 |     +1.22 +/- 1.97     | +9.00e-02 +/- 1.45e-01 |  7.46e+00 +/- 7.1e-02  |  7.37e+00 +/- 1.3e-01  |
 test_solve_fixed_iter                   |     -0.31 +/- 6.57     | -5.77e-02 +/- 1.21e+00 |  1.83e+01 +/- 7.9e-01  |  1.84e+01 +/- 9.1e-01  |

[ddudt]

This looks like its swapping CC and CS, doesn't that break the expected parity and stuff? (the minus sign is in a different place?) I think we just want to swap where the parens are?

Woops, my bad. Should be fixed now.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 95.28%. Comparing base (23a4ce8) to head (1c37f49).
Report is 1870 commits behind head on master.

Files with missing lines	Patch %	Lines
desc/input_reader.py	75.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1134   +/-   ##
=======================================
  Coverage   95.28%   95.28%           
=======================================
  Files          87       87           
  Lines       21772    21772           
=======================================
  Hits        20745    20745           
  Misses       1027     1027           

Files with missing lines	Coverage Δ
desc/input_reader.py	92.00% <75.00%> (ø)