Draft CircleCI configuration

[tsalo]

Closes #42.

Pending issues:

• [ ] ruff doesn't like how I have local testing set up.
• [ ] I need a nipreps admin to enable this project on CircleCI.
• [ ] I need help getting the Docker deployment step working.

Changes proposed in this pull request

• Try creating a CircleCI config file.
• Update documentation to reflect that output spaces aren't supported yet.
• Remove config.execution.fmripost_aroma_dir and just use config.execution.output_dir.
• Add CLI smoke tests.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 15.50388% with 109 lines in your changes missing coverage. Please review.

Project coverage is 30.54%. Comparing base (4bd4e0c) to head (550be7f). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/fmripost_aroma/tests/utils.py	18.51%	88 Missing :warning:
src/fmripost_aroma/workflows/base.py	0.00%	12 Missing :warning:
src/fmripost_aroma/cli/run.py	0.00%	3 Missing :warning:
src/fmripost_aroma/cli/workflow.py	0.00%	2 Missing :warning:
src/fmripost_aroma/utils/bids.py	0.00%	1 Missing and 1 partial :warning:
src/fmripost_aroma/cli/parser.py	0.00%	1 Missing :warning:
src/fmripost_aroma/workflows/resampling.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #43 +/- ## ========================================== - Coverage 31.18% 30.54% -0.64% ========================================== Files 26 26 Lines 2155 2259 +104 Branches 327 358 +31 ========================================== + Hits 672 690 +18 - Misses 1463 1549 +86 Partials 20 20 ```

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[tsalo]

@effigies would you be willing to activate fmripost-aroma on CircleCI?

[effigies]

Unfortunately, we need to hear back about a no-cost extension before committing more money to CircleCI. Would you be willing to run it on your fork?

[tsalo]

I can do that, although I'm not sure how the Docker deployment would work.

[tsalo]

I can just have my fork deploy I guess. I am worried about deploying from tags, but I can just push to unstable for now.

[effigies]

For docker, we could deploy via GitHub actions.

[tsalo]

That works for me. Can you either add me to the nipreps org on DockerHub (username tsalo) or add your credentials as secrets on this repo? The action I'm adding in #46 needs DOCKER_USERNAME and DOCKER_PASSWORD.