Change publication tags to use Yaml instead of Json

[caendesilva]

Since Yaml is a superset of Json, all Json will still validate. To migrate existing tag files, simply change the .json extension to .yml (example in 2c16bcd)

[codecov]

Codecov Report

Merging #837 (d2fbfad) into publications-feature (7f5876d) will not change coverage.
The diff coverage is n/a.

❗ Current head d2fbfad differs from pull request most recent head 260e477. Consider uploading reports for the commit 260e477 to get more accurate results

@@                    Coverage Diff                     @@
##             publications-feature      #837     +/-   ##
==========================================================
  Coverage                  100.00%   100.00%             
+ Complexity                   3120      1560   -1560     
==========================================================
  Files                         342       171    -171     
  Lines                        7736      3868   -3868     
==========================================================
- Hits                         7736      3868   -3868     

Impacted Files	Coverage Δ
...ckages/publications/src/Models/PublicationTags.php	100.00% <0.00%> (ø)
...blications/src/Commands/MakePublicationCommand.php
...cations/src/Commands/MakePublicationTagCommand.php
...ations/src/Commands/MakePublicationTypeCommand.php
...ckages/publications/src/Models/PublicationTags.php
...k/src/Framework/Factories/FeaturedImageFactory.php
...rc/Framework/Factories/Concerns/CoreDataObject.php
...publications/src/Actions/SeedsPublicationFiles.php
...ork/Features/Metadata/Elements/MetadataElement.php
...ork/src/Foundation/Concerns/ForwardsHyperlinks.php
... and 162 more

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