fix: Add seperate varint decoder which handles long values

[AntonAndell]

Currently we use the size decoder to decode varints, but it is limited to ints. While varints can be as large as longs. So if to large values where supplied the decoding failed

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[codecov-commenter]

Codecov Report

Merging #779 (98ba46a) into main (1075482) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #779   +/-   ##
=========================================
  Coverage     70.10%   70.10%           
  Complexity      409      409           
=========================================
  Files           154      154           
  Lines         13931    13931           
  Branches        293      293           
=========================================
  Hits           9766     9766           
  Misses         4012     4012           
  Partials        153      153           

Flag	Coverage Δ
java	81.12% <ø> (ø)

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