Bundle CLI entrypoint with main() call

[nellh]

This adds a new bids-validator.js build output that can be run with Deno without any additional code. This avoids the need to inject a caller like await main() and lets you run the validator directly from the raw script URL.

I wasn't sure if I should name it bids-validator.js or something more or less descriptive. If you download this file, it's fairly intuitive to run it with this name: deno run ./bids-validator.js

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (042d943) 83.33% compared to head (b3ea3aa) 83.33%.

❗ Current head b3ea3aa differs from pull request most recent head 0e061f5. Consider uploading reports for the commit 0e061f5 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1669   +/-   ##
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  Coverage   83.33%   83.33%           
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  Files          92       92           
  Lines        3799     3799           
  Branches     1171     1171           
=======================================
  Hits         3166     3166           
  Misses        535      535           
  Partials       98       98           

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[rwblair]

Only thing I could think of is putting bids-validator.ts in a bin directory. I could imagine thinking it would be silly to have a directory with a single file in it. I don't know how I feel about it.