feat(syncGroups):Add registration for new synchronizers

[wayfarer3130]

Adds a registration capability to add new synchronizers Based off the hanging protocol PR, but is intended to merge after that one. @sedghi and @swederik - this is a modified design that allows creating new synchronizers. There is also a bit more cleanup of types in the hanging protocol area to make that cleaner. The only connection between hanging protocols and the syncrhonizers is the existing syncGroups - otherwise, that area is actually identical. I do not yet have an example synchronizer fully worked out, but I didn't want to do that until you had seen it.

[codecov[bot]]

Codecov Report

Merging #2861 (55ea72d) into v3-stable (9f1e813) will increase coverage by 12.15%. The diff coverage is n/a.

:exclamation: Current head 55ea72d differs from pull request most recent head d056812. Consider uploading reports for the commit d056812 to get more accurate results

@@              Coverage Diff               @@
##           v3-stable    #2861       +/-   ##
==============================================
+ Coverage      25.15%   37.31%   +12.15%     
==============================================
  Files            119      102       -17     
  Lines           2862     2152      -710     
  Branches         555      442      -113     
==============================================
+ Hits             720      803       +83     
+ Misses          1856     1104      -752     
+ Partials         286      245       -41     

Impacted Files	Coverage Δ
...tform/core/src/services/CineService/CineService.js	12.50% <0.00%> (-6.25%)	:arrow_down:
.../services/MeasurementService/MeasurementService.js	47.23% <0.00%> (-1.96%)	:arrow_down:
platform/core/src/classes/CommandsManager.js	90.69% <0.00%> (-1.14%)	:arrow_down:
platform/core/src/classes/MetadataProvider.js	4.72% <0.00%> (-0.54%)	:arrow_down:
...core/src/services/ToolBarService/ToolBarService.js	1.36% <0.00%> (-0.13%)	:arrow_down:
platform/viewer/src/index.js	0.00% <0.00%> (ø)
platform/viewer/src/appInit.js	0.00% <0.00%> (ø)
platform/core/src/utils/index.js	100.00% <0.00%> (ø)
platform/core/src/DataSources/IWebApiDataSource.js	11.11% <0.00%> (ø)
...services/DicomMetadataStore/createStudyMetadata.js	0.00% <0.00%> (ø)
... and 45 more

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[cypress[bot]]

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Test summary

20 • 0 • 0 • 0

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Run details

Project	Viewers
Status	Passed
Commit	d056812372
Started	Sep 9, 2022 12:27 PM
Ended	Sep 9, 2022 12:29 PM
Duration	02:16 💡
OS	Linux Debian - 11.3
Browser	Chrome 103

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[wayfarer3130]

This change can be committed independently now from the hanging protocol change, but I would have to extract the HP stuff first, so that this one can go on top of v3-stable

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