Update energy unit references from MeV/u to MeV/nucl across documenta…

[nbassler]

closes #53

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.44%. Comparing base (f1a5a4f) to head (c1ded3c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #93   +/-   ##
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  Coverage   75.44%   75.44%           
=======================================
  Files          30       30           
  Lines        2769     2769           
  Branches      396      396           
=======================================
  Hits         2089     2089           
  Misses        593      593           
  Partials       87       87           

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[Copilot]

Pull request overview

Updates the project’s documented energy-unit convention from “MeV/u” to the clearer “MeV/nucl (MeV per nucleon)” across public docs, headers, and generated embedded-data headers, and adds fallback version macros in the core C source.

Changes:

• Replace “MeV/u” wording with “MeV/nucl” in documentation, public headers, examples, and generator script comments/output.
• Regenerate embedded dataset headers so their energy-unit comments match the new convention.
• Add default DEDX_VERSION_* compile-time macro fallbacks in src/dedx.c.

Reviewed changes

Copilot reviewed 28 out of 28 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tools/pdf2dat.py	Updates generator documentation to refer to MeV/nucl scaling.
tools/dat2c.py	Updates generator documentation and emitted header text to MeV/nucl.
src/dedx.c	Adds fallback DEDX_VERSION_* macros for builds without compile definitions.
src/dedx_embedded_data.h	Updates embedded-data struct field doc to MeV/nucl.
src/dedx_bethe.h	Updates API parameter doc to MeV/nucl.
src/data/embedded/dedx_pstar.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_mstar.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_icru90_pos.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_icru90_p.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_icru90_e.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_icru90_C.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_icru90_a.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_icru73new.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_icru73.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_icru_pstar.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_icru_astar.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_estar.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_bethe.h	Regenerated header comment uses MeV/nucl.
src/data/embedded/dedx_astar.h	Regenerated header comment uses MeV/nucl.
README.md	Updates quick-start example comment to MeV/nucl.
index.rst	Updates Sphinx docs to MeV/nucl.
include/dedx.h	Updates public API docs (min/max energy + energy params) to MeV/nucl.
include/dedx_wrappers.h	Updates wrapper API docs to MeV/nucl.
include/dedx_tools.h	Updates tools API docs to MeV/nucl.
examples/dedx_example.c	Updates example comment to MeV/nucl.
examples/dedx_csda.c	Updates example comment/print label to MeV/nucl.
examples/dedx_bethe.c	Updates example output string to MeV/nucl.
examples/dedx_bench_lookup.c	Updates benchmark output label to MeV/nucl.

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