Change installation guide for delight

[hangqianjun]

Problem & Solution Description (including issue #)

Addressing #163:

• Delight needs to be installed first before installing the rail wrapper
• On Mac, one needs to configure the c compilers correctly.

Code Quality

• My code follows the code style of this project
• I have written unit tests or justified all instances of #pragma: no cover; in the case of a bugfix, a new test that breaks as a result of the bug has been added
• My code contains relevant comments and necessary documentation for future maintainers; the change is reflected in applicable demos/tutorials (with output cleared!) and added/updated docstrings use the NumPy docstring format
• Any breaking changes, described above, are accompanied by backwards compatibility and deprecation warnings

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (9b14421) to head (1d6c94b).

Additional details and impacted files

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##              main      #164   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            1         1           
  Lines            1         1           
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  Hits             1         1           

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[hangqianjun]

Hi @sschmidt23 ! Is this mac installation guide for delight: https://github.com/LSSTDESC/Delight/blob/master/Mac_installation.md
what you mentioned yesterday at the tag up, and is it still working for Mac M2?

[sschmidt23]

Yes, that's the one, though we should check whether gcc-11 is still the latest version, or if gcc-12 or 13 or something exists now, given that it's been two years since we added this readme.

[hangqianjun]

@sschmidt23 The latest version seems to be 14.2.