refactor: refactor project route for ZIO HTTP

[irinaschubert]

Pull Request Checklist

Task Description/Number

This branch is the result of a mob programming session to refactor a route for use with ZIO HTTP.

Basic Requirements

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix: represents bug fixes
• Refactor: represents production code refactoring
• Feature: represents a new feature
• Documentation: documentation changes (no production code change)
• Chore: maintenance tasks (no production code change)
• Style: styles updates (no production code change)
• Test: all about tests: adding, refactoring tests (no production code change)
• Other... Please describe:

Does this PR introduce a breaking change?

• Yes
• No

Does this PR change client-test-data?

• Yes (don't forget to update the JS-LIB team about the change)
• No

[codecov]

Codecov Report

Base: 86.68% // Head: 86.55% // Decreases project coverage by -0.12% ⚠️

Coverage data is based on head (2a0563d) compared to base (26e9596).
Patch coverage: 0.00% of modified lines in pull request are covered.

❗ Current head 2a0563d differs from pull request most recent head 7889986. Consider uploading reports for the commit 7889986 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2338      +/-   ##
==========================================
- Coverage   86.68%   86.55%   -0.13%     
==========================================
  Files         250      253       +3     
  Lines       28252    28294      +42     
==========================================
  Hits        24490    24490              
- Misses       3762     3804      +42     

Impacted Files	Coverage Δ
...main/scala/org/knora/webapi/core/HttpServerZ.scala	0.00% <0.00%> (ø)
.../knora/webapi/http/handler/ExceptionHandlerZ.scala	0.00% <0.00%> (ø)
...org/knora/webapi/http/status/ApiStatusCodesZ.scala	0.00% <0.00%> (ø)
.../scala/org/knora/webapi/routing/HealthRouteZ.scala	0.00% <ø> (ø)
...rg/knora/webapi/routing/admin/ProjectsRouteZ.scala	0.00% <0.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.