BZ-64787 : Korean translation

[woonsan]

Description

Korean translations for UI texts, messages, etc.

Motivation and Context

Korean translation resources for better UX to Korean users.

BugZilla ticket: https://bz.apache.org/bugzilla/show_bug.cgi?id=64787

How Has This Been Tested?

Tested locally by building cleanly and proofreading through GUI with most UI elements.

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

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

[codecov-io]

Codecov Report

Merging #630 into master will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #630      +/-   ##
============================================
+ Coverage     55.26%   55.29%   +0.02%     
- Complexity    10078    10083       +5     
============================================
  Files          1038     1037       -1     
  Lines         63853    63852       -1     
  Branches       7232     7232              
============================================
+ Hits          35289    35304      +15     
+ Misses        26064    26049      -15     
+ Partials       2500     2499       -1     

Impacted Files	Coverage Δ	Complexity Δ
...java/org/apache/jmeter/gui/util/JMeterMenuBar.java	79.72% <100.00%> (+0.04%)	61.00 <0.00> (ø)
.../version/org/apache/jmeter/util/JMeterVersion.java
...ter/protocol/http/proxy/DefaultSamplerCreator.java	53.29% <0.00%> (+0.54%)	28.00% <0.00%> (+1.00%)
...main/java/org/apache/jmeter/config/CSVDataSet.java	82.20% <0.00%> (+3.38%)	40.00% <0.00%> (+2.00%)
.../apache/jmeter/timers/ConstantThroughputTimer.java	58.76% <0.00%> (+4.12%)	16.00% <0.00%> (+2.00%)
...ter/protocol/http/proxy/SamplerCreatorFactory.java	41.86% <0.00%> (+13.95%)	5.00% <0.00%> (+1.00%)

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