Refactor quality control app file layout

[zhiltsov-max]

Motivation and context

The implementation of the quality control app reached a point, where it makes sense to split it into more files. This PR does this.

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have created a changelog fragment
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (see GitHub docs)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.

[sonarqubecloud]

Quality Gate passed

Issues
22 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

❌ Patch coverage is 37.43501% with 722 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.00%. Comparing base (5ebe2b4) to head (6c27ad9).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #10166      +/-   ##
===========================================
- Coverage    82.76%   76.00%   -6.77%     
===========================================
  Files          479      432      -47     
  Lines        49420    46430    -2990     
  Branches      4162     4162              
===========================================
- Hits         40902    35287    -5615     
- Misses        8518    11143    +2625     

Components	Coverage Δ
cvat-ui	77.59% <ø> (-0.12%)	⬇️
cvat-server	74.64% <37.43%> (-11.96%)	⬇️

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