[INFRA] Move files used by examples from tests to resources

[tsalo]

Closes #589.

Changes proposed in this pull request:

• Move files used by examples from nimare/tests/data/ to nimare/resources/.

[codecov]

Codecov Report

Merging #605 (66b266b) into main (2f93987) will increase coverage by 0.29%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #605      +/-   ##
==========================================
+ Coverage   85.76%   86.05%   +0.29%     
==========================================
  Files          40       40              
  Lines        4390     4390              
==========================================
+ Hits         3765     3778      +13     
+ Misses        625      612      -13     

Impacted Files	Coverage Δ
nimare/diagnostics.py	93.10% <0.00%> (+14.94%)	⬆️

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[tsalo]

The docs build keeps failing due to the following exception and I can't figure out why:

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/nimare/envs/605/lib/python3.7/site-packages/sphinx/events.py", line 101, in emit
    results.append(listener.handler(self.app, *args))
  File "/home/docs/checkouts/readthedocs.org/user_builds/nimare/envs/605/lib/python3.7/site-packages/sphinx_gallery/docs_resolv.py", line 443, in embed_code_links
    _embed_code_links(app, gallery_conf, gallery_dir)
  File "/home/docs/checkouts/readthedocs.org/user_builds/nimare/envs/605/lib/python3.7/site-packages/sphinx_gallery/docs_resolv.py", line 354, in _embed_code_links
    cobj, full_fname, return_type=True)
  File "/home/docs/checkouts/readthedocs.org/user_builds/nimare/envs/605/lib/python3.7/site-packages/sphinx_gallery/docs_resolv.py", line 260, in resolve
    self._link_cache[full_name] = self._get_link_type(cobj)
  File "/home/docs/checkouts/readthedocs.org/user_builds/nimare/envs/605/lib/python3.7/site-packages/sphinx_gallery/docs_resolv.py", line 193, in _get_link_type
    match = self._searchindex['objects'][first][second]
TypeError: list indices must be integers or slices, not str

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/nimare/envs/605/lib/python3.7/site-packages/sphinx/cmd/build.py", line 280, in build_main
    app.build(args.force_all, filenames)
  File "/home/docs/checkouts/readthedocs.org/user_builds/nimare/envs/605/lib/python3.7/site-packages/sphinx/application.py", line 381, in build
    self.events.emit('build-finished', None)
  File "/home/docs/checkouts/readthedocs.org/user_builds/nimare/envs/605/lib/python3.7/site-packages/sphinx/events.py", line 110, in emit
    (listener.handler, name), exc, modname=modname) from exc
sphinx.errors.ExtensionError: Handler <function embed_code_links at 0x7f95666699e0> for event 'build-finished' threw an exception (exception: list indices must be integers or slices, not str)

Extension error (sphinx_gallery.docs_resolv):
Handler <function embed_code_links at 0x7f95666699e0> for event 'build-finished' threw an exception (exception: list indices must be integers or slices, not str)

[tsalo]

It's not even my fault- it's due to sphinx-gallery/sphinx-gallery#879.

Which means there are a bunch of changes that are probably not necessary...