Add NESTv2 NR parameters of quanta distribution's width

[dachengx]

Again, following A Review of NEST Models, and Their Application to Improvement of Particle Identification in Liquid Xenon Experiments and NESTv2.3.7, add NR quanta width parameters such as fano factors.

[github-actions]

Remaining comments which cannot be posted as a review comment to avoid GitHub Rate Limit

pep8

appletree/plugins/nestv2.py|177 col 10| N806 variable 'Nq' in function should be lowercase
appletree/plugins/nestv2.py|188 col 42| N803 argument name 'elecFrac' should be lowercase
appletree/plugins/nestv2.py|190 col 13| WPS221 Found line with high Jones Complexity: 16 > 14
appletree/plugins/nestv2.py|191 col 9| WPS221 Found line with high Jones Complexity: 17 > 14
appletree/plugins/nestv2.py|191 col 10| N806 variable 'Variance' in function should be lowercase
appletree/plugins/nestv2.py|202 col 42| N803 argument name 'recombProb' should be lowercase
appletree/plugins/nestv2.py|203 col 9| WPS221 Found line with high Jones Complexity: 24 > 14
appletree/plugins/nestv2.py|203 col 10| N806 variable 'widthCorrection' in function should be lowercase
appletree/plugins/nestv2.py|203 col 49| WPS204 Found overused expression: parameters['alpha2']; used 5 > 4
appletree/plugins/nestv2.py|203 col 101| E501 line too long (116 > 100 characters)
appletree/plugins/nestv2.py|204 col 9| WPS221 Found line with high Jones Complexity: 33 > 14
appletree/plugins/nestv2.py|204 col 10| N806 variable 'muCorrection' in function should be lowercase
appletree/plugins/nestv2.py|204 col 101| E501 line too long (163 > 100 characters)

[coveralls]

Pull Request Test Coverage Report for Build 4420613809

• 48 of 88 (54.55%) changed or added relevant lines in 3 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-1.04%) to 80.134%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
appletree/components/yields.py	3	6	50.0%
appletree/randgen.py	3	14	21.43%
appletree/plugins/nestv2.py	42	68	61.76%

Files with Coverage Reduction	New Missed Lines	%
appletree/components/yields.py	1	65.0%

Totals
Change from base Build 4374802690:	-1.04%
Covered Lines:	1795
Relevant Lines:	2240

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💛 - Coveralls

[zihaoxu98]

Thanks looks all good to me!