[Syntax] Support statistic-keywords in proc means

[Criptic]

Describe the bug
The statistic-keywords in proc means are not highlighting, no documentation is offered and no autocompletion is available.

Steps to reproduce
Steps to reproduce the behavior:

1. Copy and paste the code below
   proc means data=work._ddd_current skewness kurtosis n nmiss css cv min max sum mean median std stderr range uss prt t var p1 p25 p75 p99 clm lclm uclm mode qrange; ods output Summary=work.testing; run; quit;

Expected behavior
Support for Syntax Highlighting, Autocompletion & Documentation Hints for the statistical keywords in proc means.

Screenshots

Environment (please complete the following information):
Client OS: Windows 11
Extension version: v1.10.0
SAS version: Viya 2024.06

Additional context