fix: moved the i18n to mhq i18n

[Scoppio]

The tags already existed on MekHQ GUI.properties, so it should not require anything else.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 11.43%. Comparing base (0d4959b) to head (e06586d).
Report is 16 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6576      +/-   ##
============================================
- Coverage     11.57%   11.43%   -0.15%     
- Complexity     6402     6455      +53     
============================================
  Files          1085     1087       +2     
  Lines        139604   139446     -158     
  Branches      21532    21560      +28     
============================================
- Hits          16166    15949     -217     
- Misses       121868   121905      +37     
- Partials       1570     1592      +22     

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