Add similarity correlation matrix figure to IBMA reports

[JulioAPeraza]

Closes #847.

Changes proposed in this pull request:

• Adding a similarity-sorted correlation matrix figure to the summary section of the IBMA reports.

[JulioAPeraza]

Find an example here: https://nimare--852.org.readthedocs.build/en/852/auto_examples/02_meta-analyses/12_plot_ibma_workflow.html#report

[tsalo]

The figure looks great, although I'm not sure about the map sorting. What sorting method do you use?

[JulioAPeraza]

I'm using scipy.cluster.hierarchy.linkage with the method average for this matrix. I found that the diagnostic table looks better with single. Would you suggest a different method for the correlation matrix?

Here is a figure using complete:

[JulioAPeraza]

Using single:

[tsalo]

It looks like they're the same either way. "single" sounds good. Thanks for trying it both ways!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (720c5c6) 89.12% compared to head (341045b) 89.14%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #852      +/-   ##
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+ Coverage   89.12%   89.14%   +0.01%     
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  Files          49       49              
  Lines        6142     6152      +10     
==========================================
+ Hits         5474     5484      +10     
  Misses        668      668              

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[jdkent]

LGTM!