Provide a Readable<string> instead of pure string

[iPepperRnD]

I would like to use svelte-i18n to provide localized strings to a custom component, if I use string parameters and provide the value through a call to $t('...') the parameter is correctly translated but doesn't change if the language selection is modified.

I managed to have it working by passing the translation key to the component and call $t(...) directly from my component, though I don't find this really clean as it means by component has a dependency and MUST be used with translation.

Could it be possible to introduce a function which would return a Readable instead of a string ? In essence, I'd expect something like this would work:

function readable(key: string) {
   return derived( t, $t => $t(key) );

I can add this in my own code of course, but I think it would be a nice addition to the library (plus I'm not sure if it would work as nicely with parameters).