add back translate workflow

[emphasize]

• improved translate script (+auto migration)
• removed es-es locale for testing

2 workflows:

• autotranslate on push if en-us locales added (likely to be changed later on, but src_lang is always en-us, so it doesn't make sense triggering on other langs)
• propose translation for a lang to be chosen, opens a PR which then can be reviewed appropriately

[codecov[bot]]

Codecov Report

Merging #39 (806ba54) into dev (c745326) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev      #39   +/-   ##
=======================================
  Coverage   29.57%   29.57%           
=======================================
  Files           9        9           
  Lines        1055     1055           
=======================================
  Hits          312      312           
  Misses        743      743           

Flag	Coverage Δ
unittests	29.57% <ø> (ø)

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