Add chinese abbreviations for area,length,mass units

[chinasqzl]

Add chinese abbreviations for area,length,mass units

[codecov]

Codecov Report

Merging #867 (b4f838e) into master (9070996) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #867   +/-   ##
=======================================
  Coverage   83.09%   83.09%           
=======================================
  Files         287      287           
  Lines       42987    42987           
=======================================
  Hits        35720    35720           
  Misses       7267     7267           

Impacted Files	Coverage Δ
UnitsNet/GeneratedCode/UnitAbbreviationsCache.g.cs	100.00% <ø> (ø)
UnitsNet/QuantityInfo.cs	94.20% <0.00%> (ø)
UnitsNet/QuantityValue.cs	79.16% <0.00%> (ø)

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[angularsen]

This looks good to me, I just need you to verify the prefixes work as intended.

Update:
You need to run generate-code.bat to generate all the new unit abbreviations.

[angularsen]

Nuget is on the way out, thank you for the contribution!

Release UnitsNet/4.79.0 · angularsen/UnitsNet

[angularsen]

@chinasqzl Hi, there is some recent discussion on reverting 厘米 back to cm and instead localizing 厘米 for the unit enum name "Centimeter".

Assuming you know Chinese, could you please help determine what is correct?

#1171 Localization related Issues