Add simple equinox launcher+exe build launch config and enhance native build doc

[HannesWell]

This PR consists of two parts

1. Add Maven launch config to build the launcher and exe native binaries
2. Enhance native build documentation and adjust CONTRIBUTING section

[github-actions[bot]]

Test Results

  660 files  ±0    660 suites  ±0   1h 13m 31s :stopwatch: + 1m 52s 2 195 tests ±0  2 148 :white_check_mark: ±0   47 :zzz: ±0  0 :x: ±0  6 729 runs  ±0  6 586 :white_check_mark: ±0  143 :zzz: ±0  0 :x: ±0 

Results for commit 1085855e. ± Comparison against base commit a7c06014.

:recycle: This comment has been updated with latest results.