FeynDrawGram - Render Feynman diagrams from FeynDrawGram JSON files

This package renders diagrams produced by the
FeynDrawGram web app.
The input is the JSON exported by the "Save" button in the app.

Typical use:

#import "@preview/feyndrawgram:1.0.0": feyndrawgram

#feyndrawgram(json("my-diagram.json"))

Parameters:

• use-cetz-decorations (default: false)
  If false, photons/gluons are drawn by sampling exactly the same
  analytic path the web app shows on screen. If true, simple
  straight wavy/gluon edges with multiplicity 1 use CeTZ' native
  decorations.wave / coil; curved or multi-line oscillating edges
  always fall back to sampling so that parallel waves stay in
  phase.
• unit (default: 1pt)
  Length of one canvas pixel in document units.