[CI] add windows

[jdkent]

Closes # .

Changes proposed in this pull request:

Summary by Sourcery

Expand and standardize continuous integration testing across platforms and test suites.

CI:

• Add Windows runners to the main test matrix in the GitHub Actions workflow.
• Standardize package installation in CI by using python -m pip across all jobs.
• Replace make-based test invocations in CI with explicit pytest commands and markers for different test groups.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR updates the CI test workflow to add Windows to the OS matrix and replaces make-based test invocations with explicit pip/pytest commands that are more portable across platforms while preserving coverage collection and test selection via markers.

File-Level Changes

Change	Details	Files
Extend CI matrix to test on Windows in addition to existing platforms.	Add windows-latest to the OS matrix for the main test job that runs across Python 3.10–3.14	.github/workflows/testing.yml
Make Python package installation commands explicit and more portable.	Replace bare pip install -e .[...] calls with python -m pip install -e .[...] to ensure the correct interpreter is used across platforms, including Windows Apply this change consistently across all jobs (full tests, minimum-deps tests, performance estimator/corrector/smoke, and cbmr_importerror jobs)	.github/workflows/testing.yml
Replace make-based test commands with direct pytest invocations while preserving coverage options and marker selection.	Change make unittest to a direct python -m pytest invocation filtering out performance and cbmr_importerror markers and enabling coverage with --cov-append --cov-report=xml --cov=nimare Change make test_performance_estimators to python -m pytest -m "performance_estimators" with the same coverage options Change make test_performance_correctors to python -m pytest -m "performance_correctors" with the same coverage options Change make test_performance_smoke to python -m pytest -m "performance_smoke" with the same coverage options Change make test_cbmr_importerror to python -m pytest -m "cbmr_importerror" with the same coverage options	.github/workflows/testing.yml

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[sourcery-ai]

Hey - I've left some high level feedback:

• Since the matrix now includes windows-latest but the steps still force shell: bash {0}, consider explicitly configuring an appropriate shell per OS (e.g., bash for *nix and pwsh for Windows) or using the default shell so that Windows runners don’t depend on Git Bash being present.
• The long python -m pytest ... command is duplicated across multiple jobs; extracting the common arguments into a job-level env variable or a composite/reusable action would reduce duplication and make future changes to the test invocation less error-prone.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Since the matrix now includes `windows-latest` but the steps still force `shell: bash {0}`, consider explicitly configuring an appropriate shell per OS (e.g., `bash` for *nix and `pwsh` for Windows) or using the default shell so that Windows runners don’t depend on Git Bash being present.
- The long `python -m pytest ...` command is duplicated across multiple jobs; extracting the common arguments into a job-level `env` variable or a composite/reusable action would reduce duplication and make future changes to the test invocation less error-prone.

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[codecov]

Codecov Report

❌ Patch coverage is 77.27273% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.50%. Comparing base (dd6f578) to head (1084936).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
nimare/utils.py	76.19%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #995      +/-   ##
==========================================
- Coverage   86.60%   86.50%   -0.10%     
==========================================
  Files          51       51              
  Lines        9076     9125      +49     
==========================================
+ Hits         7860     7894      +34     
- Misses       1216     1231      +15     

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