Add some boilerplate code to add support for localization

locale/README.md

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+On my Windows wsl2 (more generic explaination is needed):
+
+`find ./gui -iname "*.py" | xargs pygettext3 -d lang -o locale/lang.pot`
+
+This will generate the pot that should be carried over to the various language directories and renamed .po
+
+`msgfmt -o lang.mo lang`
+
+Run in each language directory, will compile the .po files to .mo files
+
+## Issues
+`zh_CH` doesn't seem to work. AddCatalog is not functioning. See https://discuss.wxpython.org/t/localization-not-working-with-zh-ch-addcatalog-returns-false/34628