Fortran support

[Bchass]

Description

• added asfortranarray()
• update flags setter
• update flags property
• update ndarray to keep track of asfortranarray()

Related Issue

Closes: #14

Checklist

• My changes pass all existing automated tests.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have updated the documentation accordingly.

Additional Notes

• Add test cases
• Update _strides_for_shape to support Fortran
• Fix bug where _stides_for_shape will calculate C and F at the same time.
• Update ndarray strides for Fortran
• Update transpose
• add f_cont and test
• fix test_order_flags
• fix buffersize calculations
• fix _repr_ for Fortran
• Update order option
• Make sure order='F' sets F_CONTIGUOUS to True.
• Update _get_step()

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.01%. Comparing base (a297594) to head (8b60355).

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #23      +/-   ##
==========================================
- Coverage   86.67%   86.01%   -0.67%     
==========================================
  Files           5        2       -3     
  Lines        1629      915     -714     
==========================================
- Hits         1412      787     -625     
+ Misses        217      128      -89     

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[Bchass]

Need to review changes for _strides_for_shape. Some test cases will fail for GH Actions but not locally.