feat(dsp): catalog pagination through continuation token and Link header

[ndr-brt]

What this PR changes/adds

Implement pagination as described by DSP specification.
The continuationToken is the json representation of a QuerySpec object encoded in base64.

The core of the implementation is the ContinuationTokenManager component that provides two features:

• being able to eventually deserialize and apply to the requestBody the continuationToken
• set the Link header on the response through the ResponseDecorator

Why it does that

dsp completion

Further notes

List other areas of code that have changed but are not necessarily linked to the main feature. This could be method
signature changes, package declarations, bugs that were encountered and were fixed inline, etc.

Linked Issue(s)

Closes #3866

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 88.73239% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 74.71%. Comparing base (7f20ba5) to head (30dc870).
Report is 210 commits behind head on main.

Files	Patch %	Lines
...main/java/org/eclipse/edc/spi/query/QuerySpec.java	41.66%	7 Missing ⚠️
...tp/api/decorator/ContinuationTokenManagerImpl.java	88.88%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4103      +/-   ##
==========================================
+ Coverage   71.74%   74.71%   +2.97%     
==========================================
  Files         919      982      +63     
  Lines       18457    20142    +1685     
  Branches     1037     1133      +96     
==========================================
+ Hits        13242    15050    +1808     
+ Misses       4756     4598     -158     
- Partials      459      494      +35     

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