CSPICE integration

[attipaci]

Provides optional ephemeris support via the NAIF CSPICE Toolkit in separate solsys-cspice.so[.1] / .a plugin libraries.

To enable, CSPICE_SUPPORT must be set to 1 prior to the build (in the shell or in config.mk) and you must have access to the CSPICE development files (C headers and unversioned libaries). You might want to check out the Smithsonian/cspice-sharedlib repository to help you build CSPICE as a shared library (libcspice.so[.1]).

Added functions are:

• int novas_use_cspice() -- to use CSPICE for all Solar-system types.

• int novas_use_cspice_planets() -- to use CSPICE for major planets (and Sun, Moon, SSB) only.

• int novas_use_cspice_ephem() -- to use CSPICE for NOVAS_EPHEM_OBJECT types only.

To use the plugin, you must link your application with:

 -lsolsys-cspice

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.65%. Comparing base (e46497e) to head (1ca88b1).
Report is 1 commits behind head on main.

Additional details and impacted files

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  Coverage   99.65%   99.65%           
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  Files           8        8           
  Lines        2904     2904           
  Branches      561      561           
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  Hits         2894     2894           
  Partials       10       10           

Flag	Coverage Δ
unittests	99.65% <ø> (ø)

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