chore: Switch JWT library to use ZIO-JSON instead of Spray JSON

[BalduinLandolt]

Pull Request Checklist

Task Description/Number

Issue Number: DEV-

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

Does this PR change client-test-data?

• Yes

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 13.33%. Comparing base (62260e4) to head (f6d1e7e).
Report is 2 commits behind head on main.

Files	Patch %	Lines
...in/scala/org/knora/webapi/routing/JwtService.scala	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3154       +/-   ##
===========================================
- Coverage   88.79%   13.33%   -75.47%     
===========================================
  Files         265      266        +1     
  Lines       22260    22354       +94     
===========================================
- Hits        19765     2980    -16785     
- Misses       2495    19374    +16879     

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