Adding translator class to handle multiple languages

[Vairgrys]

Added a Javascript Class to start handling Multiple Languages on tools that need the translate of the texts on diferent countrys, currently it only handles language per tool and not on global options.

Currently tools modified
AreaTool

• units text

DistanceTool

• units text
• start text

Added json files to handle the node to access the text translated

• zh-CN
• en-US
• es-MX

[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (master@a4b9f17). Click here to learn what that means.

❗ Current head 48e4efe differs from pull request most recent head 000a795. Consider uploading reports for the commit 000a795 to get more accurate results

Files	Patch %	Lines
src/lang/translator.js	77.41%	7 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff            @@
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  Coverage          ?   83.61%           
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  Files             ?      168           
  Lines             ?    18608           
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  Hits              ?    15560           
  Misses            ?     3048           
  Partials          ?        0           

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[fuzhenn]

Thanks!