build: Add Maven wrapper

[guidobrei]

This PR

• adds Maven wrapper to the repository

Related Issues

mvn wrapper is also avialable in java-sdk-contrib

Follow-up Tasks

We may want to use mvnw in CI pipelines

How to test

run ./mvnw -version

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.91%. Comparing base (3816151) to head (d89be80).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1129      +/-   ##
============================================
+ Coverage     93.71%   93.91%   +0.19%     
- Complexity      429      430       +1     
============================================
  Files            40       40              
  Lines          1019     1019              
  Branches         72       72              
============================================
+ Hits            955      957       +2     
+ Misses           40       39       -1     
+ Partials         24       23       -1     

Flag	Coverage Δ
unittests	93.91% <ø> (+0.19%)	⬆️

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