[MISC] In bidsschematools, exclude .gitignore files from sdists

[musicinmybrain]

Before:

bids-specification/tools/schemacode $ python3 -m build
bids-specification/tools/schemacode $ tar -tzvf dist/*.gz | grep git
-rw-r--r-- 0/0               2 2025-05-16 10:53 bidsschematools-1.1.0.dev0/.gitignore
-rw-r--r-- 0/0              15 2025-05-16 10:44 bidsschematools-1.1.0.dev0/tests/data/.gitignore

After:

bids-specification/tools/schemacode $ git clean -fxd
bids-specification/tools/schemacode $ python3 -m build
bids-specification/tools/schemacode $ tar -tzvf dist/*.gz | grep git
(no output)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.10%. Comparing base (1e14c26) to head (b4faef2).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2117   +/-   ##
=======================================
  Coverage   82.10%   82.10%           
=======================================
  Files          17       17           
  Lines        1531     1531           
=======================================
  Hits         1257     1257           
  Misses        274      274           

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[effigies]

Would you mind targeting maint/1.10.0?

[musicinmybrain]

Would you mind targeting maint/1.10.0?

Done! Unfortunately, the intermediate state while I was retargeting this PR caused GitHub to ping a lot of people unnecessarily.

[effigies]

Weirdly, this doesn't seem to fix things in CI (https://github.com/bids-standard/bids-specification/actions/runs/15069847259/job/42363116831), and I don't have the problem locally. I'm going to try pushing a more up-to-date build process...

[effigies]

Seems fixed: https://github.com/bids-standard/bids-specification/actions/runs/15073545009

[musicinmybrain]

I confirm that 1.0.8 looks right to me. Thanks.