Add data protocol via control protocol

[BenediktBurger]

Closes #89

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.69%. Comparing base (eb62368) to head (20a3001).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #91      +/-   ##
==========================================
+ Coverage   89.65%   89.69%   +0.04%     
==========================================
  Files          38       39       +1     
  Lines        2996     3029      +33     
  Branches      371      375       +4     
==========================================
+ Hits         2686     2717      +31     
- Misses        259      261       +2     
  Partials       51       51              

Flag	Coverage Δ
unittests	89.69% <100.00%> (+0.04%)	⬆️

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