feat: Make service work with json (DEV-3930)

[seakayone]

• Add filter and query params to projects endpoint
• Add paging to projects endpoint
• Serve data from json files
• Fix loading assets in webapp in subpages
• Introduce project.status to json schemas
• Remove _*.json data

Basically you can ignore the changes of the *.json files. I have copied over the latest version from the Go service and added the project.status property with the python script from this pr. That also reformatted all json files, hence so many changed lines.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.7%. Comparing base (c453d59) to head (a263a60).

Additional details and impacted files

Files	Coverage Δ
dsp-meta-cmd/src/main-server.rs	0.0% <ø> (ø)
dsp-meta-cmd/src/main-validator.rs	0.0% <ø> (ø)
...p-meta/src/api/handler/project_metadata_handler.rs	0.0% <ø> (-40.0%)	⬇️
dsp-meta/src/api/model/project_metadata_dto.rs	0.0% <ø> (-33.4%)	⬇️
dsp-meta/src/api/router.rs	99.0% <ø> (-0.2%)	⬇️
dsp-meta/src/domain/model/draft_model.rs	82.6% <ø> (ø)
dsp-meta/src/domain/model/error.rs	0.0% <ø> (ø)
dsp-meta/src/domain/model/json_schema_validator.rs	81.8% <ø> (ø)
...eta/src/domain/service/project_metadata_service.rs	50.0% <ø> (-41.0%)	⬇️
dsp-meta/src/domain/service/repository_contract.rs	0.0% <ø> (-23.6%)	⬇️
... and 2 more

[BalduinLandolt]

Great job!

[linear]

DEV-3930 Use current json to serve current frontend

[mpro7]

Thanks for all improvements and also cleanup with some consts! Overall looks good, but there are few things I asked in comments below. The ones regarding formatting are rather for further discussion, not blocking comments.

[mpro7]

Comment for me - check it in detail if it could be improved.

[seakayone]

You have an idea?

[mpro7]

NOt yet, but if I will have, will open a PR.