[DOC] Misc doc updates

[Remi-Gau]

• closes BIDS way of naming the ROIs #480
• closes demos - visual motion not documented properly #423 (not ideal but better than before)

[codecov]

Codecov Report

Merging #484 (371a14b) into dev (be9ba3f) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 371a14b differs from pull request most recent head 3cd924a. Consider uploading reports for the commit 3cd924a to get more accurate results

@@           Coverage Diff           @@
##              dev     #484   +/-   ##
=======================================
  Coverage   73.36%   73.36%           
=======================================
  Files         189      189           
  Lines        3924     3924           
=======================================
  Hits         2879     2879           
  Misses       1045     1045           

Flag	Coverage Δ
unittests	73.36% <100.00%> (ø)

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Impacted Files	Coverage Δ
src/bids_model/createDefaultStatsModel.m	97.22% <ø> (ø)
src/workflows/stats/bidsFFX.m	76.27% <100.00%> (ø)

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[Remi-Gau]

updating contribution levels

@all-contributors please add @marcobarilari for userTesting

[allcontributors]

@Remi-Gau

I've put up a pull request to add @marcobarilari! 🎉

[Remi-Gau]

@all-contributors please add @CerenB for userTesting

[allcontributors]

@Remi-Gau

I've put up a pull request to add @CerenB! 🎉

[Remi-Gau]

@all-contributors please add @fcerpe for userTesting

[allcontributors]

@Remi-Gau

I've put up a pull request to add @fcerpe! 🎉

[Remi-Gau]

@all-contributors please add @mwmaclean for userTesting

[allcontributors]

@Remi-Gau

I've put up a pull request to add @mwmaclean! 🎉

[Remi-Gau]

@all-contributors please add @fedefalag for userTesting

[allcontributors]

@Remi-Gau

I've put up a pull request to add @fedefalag! 🎉