Confounds Timeseries and External Regressor Visualization

[eurunuela]

Summary

Tedana outputs confounds timeseries (desc-confounds_timeseries.tsv). Rica should offer visualization for these, allowing users to review correlations between confounds and ICA/PCA components interactively.

Additional Detail

• Enable confounds timeseries plotting with selection/filter options
• Link confounds to component metrics
• Highlight confound-driven components in table/scatter plots
• Documentation/examples for interpretation

Next Steps

1. Map confounds file schema(s)
2. Integrate plotting UI
3. Tie confounds to component selection and QC
4. Update onboarding and docs