Auto translate UMG mod strings using DeepL

Run example (run python -m umg_autolocalize --help for complete command-line options), newlines added for readability:

python
-m umg_autolocalize
--apikey <DeepL_key>
--output output/directory
--free
--target-lang ID
lootplot/saves/save1/localization/localization.json
lootplot/clientdata/localization/localization.json

If you're using DeepL Pro, remove the --free command-line option.