refactor: clean up :ids-transform and :ids-spi

[juliapampus]

What this PR changes/adds

Refactors modules :ids-transform and :ids-spi.

• Introduces package structure to :ids-transform
• Refactores package structure in :ids-spi
• Unifies DefaultValues and IdsProtocol to IdsConstants in :ids-spi, removes IdsProtocol from :ids-transform
• Deletes IdsIdParser and introduces methods toUri, from(URI) and from(String) to IdsId
• Removes transformer classes for IdsId to URI and vice versa
• Renames transformer classes to "toIds" and "fromIds" for a better class name ordering
• Refactors all transformer classes
• Merge ContractOfferFromIdsContractOfferTransformer and ContractOfferFromIdsContractRequestTransformer to ContractOfferFromIdsContractOfferOrRequestTransformer
• Cleans up some transformer tests
• Adds mapping of edc-sepcific policy properties to and from IDS contract objects

Why it does that

Cleaning up ids modules

Further notes

core clean up will follow, e.g. for better readability

Linked Issue(s)

Closes #1473
Relates #1351
Relates #1761

Checklist

• added appropriate tests?
• performed checkstyle check locally?
• added/updated copyright headers?
• documented public classes/methods?
• added/updated relevant documentation?
• assigned appropriate label? (exclude from changelog with label no-changelog)
• formatted title correctly? (take a look at the CONTRIBUTING and styleguide for details)

[codecov-commenter]

Codecov Report

Merging #1750 (939bcfe) into main (33803c4) will decrease coverage by 57.18%.
The diff coverage is 6.79%.

@@              Coverage Diff              @@
##               main    #1750       +/-   ##
=============================================
- Coverage     67.77%   10.59%   -57.19%     
- Complexity        0      477      +477     
=============================================
  Files           795      793        -2     
  Lines         16968    16840      -128     
  Branches       1079     1076        -3     
=============================================
- Hits          11500     1784     -9716     
- Misses         5005    14973     +9968     
+ Partials        463       83      -380     

Impacted Files	Coverage Δ
...ispatcher/IdsMultipartRemoteMessageDispatcher.java	50.00% <0.00%> (ø)
...nder/MultipartCatalogDescriptionRequestSender.java	5.88% <0.00%> (ø)
...r/MultipartEndpointDataReferenceRequestSender.java	21.42% <0.00%> (-71.43%)	⬇️
.../api/multipart/handler/ArtifactRequestHandler.java	14.28% <0.00%> (-51.85%)	⬇️
...pi/multipart/handler/ContractAgreementHandler.java	70.58% <ø> (ø)
...aceconnector/ids/core/IdsCoreServiceExtension.java	0.00% <0.00%> (ø)
...tor/ids/core/serialization/IdsTypeManagerUtil.java	0.00% <0.00%> (-75.61%)	⬇️
...nnector/ids/core/service/ConnectorServiceImpl.java	0.00% <ø> (-100.00%)	⬇️
...tor/ids/core/service/ConnectorServiceSettings.java	0.00% <0.00%> (-1.08%)	⬇️
...ataspaceconnector/ids/spi/domain/IdsConstants.java	0.00% <0.00%> (ø)
... and 590 more

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[juliapampus]

@paullatzelsperger @alexandrudanciu Added the mapping of whatever Policy properties to/from the ids ContractOffer and ContractAgreement. See PropertyUtilTest for a legalText example (you may call it differently).

[ndr-brt]

I missed a possible NPE, after this I think we are ready to go from my side

[ndr-brt]

🚀