Reorder admix plots

[eviecarter33]

Fix tidy.q_matrix infrastructure and test gt_admix objects

[codecov]

Codecov Report

Attention: Patch coverage is 97.60479% with 4 lines in your changes missing coverage. Please review.

Project coverage is 86.58%. Comparing base (c254875) to head (93af987).
Report is 37 commits behind head on main.

Files with missing lines	Patch %	Lines
R/q_matrix.R	94.23%	3 Missing ⚠️
R/gt_snmf.R	98.94%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #71      +/-   ##
==========================================
+ Coverage   85.96%   86.58%   +0.62%     
==========================================
  Files          96       97       +1     
  Lines        3690     3839     +149     
==========================================
+ Hits         3172     3324     +152     
+ Misses        518      515       -3     

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[dramanica]

Amazing work @eviecarter33! A couple of minor things to do before we can merge in:

• The website needs gt_snmf to be added to the pkgdown yaml.
• There are a few lines not tested that are highlighted by codecov. Looking at them, it seems that we don't test a couple of combinations of metadata input for q_matrix. It would be nice to add those to the tests (it shouldn't be much work given all the tests that you have created, it should just be a matter to add that particular permutation of metadata).