WIP: Add skeleton of particle/data/mass_width_extended.fwf

[eduardo-rodrigues]

This is the new extended particle data file for the package, to be maintained by us.

It effectively amalgamates and organises for the better what we have been using from the good-old 2008 PDG file mass_width_2008.fwf (only released that one year!) to provide extended information, which required our own mass_width_2008_ext.fwf to implement various sorts of updates (particle PDG IDs changing over time, etc.) It was becoming slightly unmaintainable to continue this way, and certainly not optimal. This master file solves issues.

Closes #118.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.10%. Comparing base (24969f7) to head (9c109f5).
⚠️ Report is 31 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #488      +/-   ##
==========================================
- Coverage   96.17%   96.10%   -0.08%     
==========================================
  Files          31       31              
  Lines        1335     1335              
==========================================
- Hits         1284     1283       -1     
- Misses         51       52       +1     

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[eduardo-rodrigues]

FYI @henryiii, @tamasgal and @redeboer since you showed interest in these files in the past. Feel free to add colleagues you know will be interested as well. I'm obviously very happy to receive any feedback.

In case you wonder - many values are dummy (-1) because they get overriden (on purpose) with information from the yearly PDG data files. This is to ensure the actual CSV file used by Particle contains always the latest and greatest info. Let me know if anything in unclear.

[redeboer]

FYI @henryiii, @tamasgal and @redeboer since you showed interest in these files in the past. Feel free to add colleagues you know will be interested as well.

@mmikhasenko

[tamasgal]

Thanks!

@8me