Create object representation for the tags.json file.

[caendesilva]

This refactor solves two problems:

1. It groups together related logic in a single class
2. It makes the data structure of the tags file more clear and structured thanks to rich type annotations

[codecov]

Codecov Report

Merging #802 (82dc5df) into publications-feature (99d9ce4) will not change coverage.
The diff coverage is n/a.

❗ Current head 82dc5df differs from pull request most recent head 19233d8. Consider uploading reports for the commit 19233d8 to get more accurate results

@@                    Coverage Diff                     @@
##             publications-feature      #802     +/-   ##
==========================================================
  Coverage                  100.00%   100.00%             
+ Complexity                   2856      1444   -1412     
==========================================================
  Files                         332       167    -165     
  Lines                        7194      3628   -3566     
==========================================================
- Hits                         7194      3628   -3566     

Impacted Files	Coverage Δ
...ework/Features/Publications/PublicationService.php	100.00% <0.00%> (ø)
...ework/Features/Publications/PublicationService.php
...rc/Framework/Exceptions/RouteNotFoundException.php
.../Framework/Features/Blogging/Models/PostAuthor.php
...ork/src/Foundation/Concerns/ForwardsFilesystem.php
...rk/Features/Publications/PublicationFieldTypes.php
...ramework/src/Foundation/Facades/FileCollection.php
...work/src/Framework/Concerns/ValidatesExistence.php
...framework/src/Console/Commands/ValidateCommand.php
...k/src/Framework/Views/Components/LinkComponent.php
... and 158 more

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