added sunflower genome

[chriscrsmith]

Added basic data for the sunflower genome:

• chromosome lengths
• average recombination rate estimate
• average mutation rate estimate
• generation time
• population size estimate

There are some other good resources available for sunflower, e.g. genetic maps and annotations, that could be added in. Although it's not super straightforward to find the actual data for these resources.

[chriscrsmith]

(sorry forgot pre-commit)

QC checklist: #1219

[codecov]

Codecov Report

Merging #1218 (5aa5cf5) into main (642e79d) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1218   +/-   ##
=======================================
  Coverage   99.55%   99.56%           
=======================================
  Files          95       98    +3     
  Lines        3171     3182   +11     
  Branches      414      414           
=======================================
+ Hits         3157     3168   +11     
  Misses          6        6           
  Partials        8        8           

Impacted Files	Coverage Δ
stdpopsim/catalog/HelAnn/__init__.py	100.00% <100.00%> (ø)
stdpopsim/catalog/HelAnn/genome_data.py	100.00% <100.00%> (ø)
stdpopsim/catalog/HelAnn/species.py	100.00% <100.00%> (ø)

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[grahamgower]

Thanks @chriscrsmith, this looks good to me!

[chriscrsmith]

Thanks @grahamgower !