BREAKING: get rid of locales as generator-config

[ivanhofer]

^{Originally posted by ivanhofer October 2, 2021}
This option only makes sense inside the rollup-process, so it should only be available there.

Currently the rollup- and webpack-process allows to configure the generator by passing it as an argument. This option should be removed and the config should always be loaded from the .typesafe-i18n.json-file. This would mean a breaking change so a error-massage should point to a migration-guide.

[ivanhofer]

The node-process is the recommended way to run the generator.

The rollup-plugin can be used to apply compile-time optimizations.
As of right now the webpack-plugin has no advantages. It can be used to start the generator when webpack is started.

Both plugins don't take generator-config options anymore,
Migrating is easy: just create a .typesafe-i18n,json in the root of your project and specify the options in that file.