deno validator: add option to run only specified list of checks

[yarikoptic]

in relation to

• https://github.com/bids-standard/bids-validator/issues/1999

to avoid waiting the validation of hundreds of subjects just to see the effect on README_FILE_MISSING .

Probably would relate to discussion

• https://github.com/bids-standard/bids-validator/issues/1937#issuecomment-2156630201

since boils down to specification of what to do/skip/etc

edits

• a duplicate issue was filed/closed which carries more feedback from other users: https://github.com/bids-standard/bids-validator/issues/2144#issuecomment-2391158177