add a barely working flux model #940

Job	Run time
publish-docs	0s
lint	7s
test-gpu	13m 43s
Build Wheel	14s
test-non-gpu (3.10, ubuntu-latest)	5m 36s
type-check	3m 3s
test-non-gpu (3.11, ubuntu-latest)	4m 57s
Smoketest (Python 3.10, ubuntu-latest)	1m 34s
Smoketest (Conda, Python 3.10, ubuntu-latest)	1m 49s
Smoketest (Python 3.10, windows-latest)	1m 9s
Smoketest (Conda, Python 3.10, windows-latest)	2m 49s
Smoketest (Python 3.10, m2-16gb)	35s
Smoketest (Conda, Python 3.10, m2-16gb)	1m 45s
Smoketest (Python 3.11, ubuntu-latest)	1m 21s
Smoketest (Conda, Python 3.11, ubuntu-latest)	1m 50s
Smoketest (Python 3.11, windows-latest)	2m 4s
Smoketest (Conda, Python 3.11, windows-latest)	2m 44s
Smoketest (Python 3.11, m2-16gb)	30s
Smoketest (Conda, Python 3.11, m2-16gb)	1m 45s
	47m 35s

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