Completely rewrite HED support

[happy5214]

This commit completely rewrites the HED integration module to only build most objects when necessary (due to memory issues).

This depends on code in hed-validator that has not yet been released to npm, and thus it currently does not build. Please test using the modify-bids-interface branch of hed-validator and npm link.

[VisLab]

This looks great --- and follows as discussed in the code walk through.

@rwblair -- this update should also allow the HED validator to be used more easily in the deno version. (The current deno version may not actually validate HED.)

This version will require package lock to hed-validator v3.15.0 (which @happy5214 is in the processing of releasing on npm).

[codecov]

Codecov Report

Attention: Patch coverage is 86.11111% with 5 lines in your changes missing coverage. Please review.

Project coverage is 86.77%. Comparing base (53fdba6) to head (b2024d9).
Report is 2 commits behind head on master.

Files	Patch %	Lines
bids-validator/validators/hed.js	85.71%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2014      +/-   ##
==========================================
+ Coverage   85.68%   86.77%   +1.09%     
==========================================
  Files          91      132      +41     
  Lines        3792     6346    +2554     
  Branches     1220     1522     +302     
==========================================
+ Hits         3249     5507    +2258     
- Misses        457      748     +291     
- Partials       86       91       +5     

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[effigies]

The ieeg_epilepsy_ecog example is failing, presumably because it has "HEDVersion": "n/a" in its dataset_description.json. Will open a PR to remove that, unless you'd rather it stay?

[VisLab]

Yes, it should be removed. If a dataset_description.json has a HedVersion field, it must be a valid HED version or it is considered to be an error. Thx!