Expose argument names to minecraft extras help message provider

[jpenilla]

As noted this only properly works for arguments used a single time (as backwards compat uses arg index), however this works for all current arguments.

[github-actions[bot]]

Unit Test Results

  51 files  ±0    51 suites  ±0   6s :stopwatch: ±0s 218 tests ±0  218 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0  219 runs  ±0  219 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0 

Results for commit 0b22a37b. ± Comparison against base commit b8559474.

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

[jpenilla]

Done in 2.0