add i18n resouces(zh_CN)

[hellyguo]

Description

add i18n resouces
add some *_zh_CN.properties

Motivation and Context

to imporve UI in Chinese

How Has This Been Tested?

just resources. No code is modified.

Screenshots (if appropriate):

Types of changes

• Enhancement

Checklist:

• [x ] My code follows the code style of this project.
• [ x] I have updated the documentation accordingly.

[codecov-io]

Codecov Report

Merging #349 into trunk will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              trunk     #349   +/-   ##
=========================================
  Coverage     58.35%   58.35%           
+ Complexity    10205    10204    -1     
=========================================
  Files          1159     1159           
  Lines         74384    74384           
  Branches       7361     7361           
=========================================
  Hits          43407    43407           
+ Misses        28483    28481    -2     
- Partials       2494     2496    +2

Impacted Files	Coverage Δ	Complexity Δ
...s/org/apache/jmeter/timers/PoissonRandomTimer.java	72.97% <0%> (-5.41%)	9% <0%> (-1%)
...apache/jmeter/extractor/TestBoundaryExtractor.java	97.88% <0%> (ø)	17% <0%> (ø)	⬇️
...ocol/jms/org/apache/jmeter/protocol/jms/Utils.java	56.98% <0%> (+2.15%)	15% <0%> (ø)	⬇️

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