[FABG-970] Add CODE_OF_CONDUCT and CONTRIBUTING

[troyronda]

Signed-off-by: Troy Ronda troy@troyronda.com

[codecov]

Codecov Report

Merging #82 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #82      +/-   ##
==========================================
+ Coverage   74.62%   74.64%   +0.01%     
==========================================
  Files         189      189              
  Lines       13226    13226              
==========================================
+ Hits         9870     9872       +2     
+ Misses       2411     2410       -1     
+ Partials      945      944       -1     

Impacted Files	Coverage Δ
pkg/util/concurrent/lazycache/lazycache.go	88.34% <0.00%> (-3.89%)	⬇️
pkg/util/concurrent/lazyref/lazyref.go	96.31% <0.00%> (+3.68%)	⬆️

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