feat(num): add abbreviate utility

[brc-dd]

fixes #285

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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.01 🎉

Comparison is base (976081b) 82.80% compared to head (c489976) 82.81%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #286      +/-   ##
==========================================
+ Coverage   82.80%   82.81%   +0.01%     
==========================================
  Files         120      120              
  Lines       10090    10097       +7     
  Branches      419      419              
==========================================
+ Hits         8355     8362       +7     
  Misses       1735     1735              

Impacted Files	Coverage Δ
lib/support/Num.ts	100.00% <100.00%> (ø)

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[kiaking]

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