Adds a Firefly particle group generator#184

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zhafen wants to merge 6 commits intotrident-project:mainfrom

Commits on Feb 27, 2021

Added basic integration with linetools.
zhafen
committed

Commits on Jul 29, 2022

Merge branch 'trident-project:main' into master
zhafen
authored

Commits on Jul 30, 2022

Commits on Aug 1, 2022

Added guideline particle group, fixed up other particle group.
zhafen
committed

Commits on Aug 26, 2022

Merge branch 'trident-project:main' into firefly
zhafen
authored