tedpca CLI fix

[handwerkerd]

Closes #949.

Changes proposed in this pull request:

• Fixes a bug where tedpca can accept several strings or numbers as inputs, but the argument parser for the command line interface (CLI) rejected any option except aic mdl or kic.
• Also cleans up some language in docs and comments

@BahmanTahayori Can you check to confirm this resolves your issue?

[tsalo]

Looks good to me. check_tedpca_value should be able to validate the value.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (9a3b83f) 88.97% compared to head (f304e20) 88.97%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #950   +/-   ##
=======================================
  Coverage   88.97%   88.97%           
=======================================
  Files          27       27           
  Lines        3373     3373           
  Branches      617      617           
=======================================
  Hits         3001     3001           
  Misses        226      226           
  Partials      146      146           

Impacted Files	Coverage Δ
tedana/decomposition/pca.py	76.61% <ø> (ø)
tedana/workflows/tedana.py	80.95% <ø> (ø)

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[eurunuela]

LGTM!

[BahmanTahayori]

Thanks, Dan and the team,

Yes, that is what I did on my venv as well. Thanks for fixing this issue quickly.