P1BIGROCKS-1359 updating contributing file to link to external github contributions

General MR

Summary

updating contributing file to link to external github contributions

added kinddocs statusreview labels

requested review from @andrewshoell, @jamie.causey, @nicole.dupree, @mlunato47, @brettcharrier, @ben.francis, @montgomery.marcus, @jaredmladner, and @ryan.j.garcia

assigned to @seanthomas007

removed review request for @nicole.dupree

removed review request for @montgomery.marcus

requested review from @bkhamitov, @alieberman, @snaq11092, and @jimmy.bourque

approved this merge request

mentioned in commit 093b7838

merged