feat: data plane client for signaling protocol

[wolf4ood]

What this PR changes/adds

Introduces a new module data-plane-signaling-client that implements a DataPlaneClient for the data plane signaling protocol.

Why it does that

data plane signaling adoption

Linked Issue(s)

Closes #3900

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.30159% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 73.34%. Comparing base (7f20ba5) to head (7cef713).
Report is 114 commits behind head on main.

Files	Patch %	Lines
...tor/dataplane/client/DataPlaneSignalingClient.java	87.75%	6 Missing ⚠️
...lane/client/DataPlaneSignalingClientExtension.java	75.00%	1 Missing ⚠️
...nt/DataPlaneSignalingClientTransformExtension.java	90.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3947      +/-   ##
==========================================
+ Coverage   71.74%   73.34%   +1.59%     
==========================================
  Files         919      953      +34     
  Lines       18457    19174     +717     
  Branches     1037     1085      +48     
==========================================
+ Hits        13242    14063     +821     
+ Misses       4756     4651     -105     
- Partials      459      460       +1     

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