i18n functions everywhere

[schlawg]

now all i18n keys require a function call.

console.log(i18n.site.yes()); // prints 'Yes'

console.log(i18n.site.no); // prints '(...t)=>l(e,...t).join("")'

console.log(i18n.study.perPage(12)); // if we don't have study i18n, prints 'perPage'

console.log((i18n.storm as any).nonExistentKey(6, 'ignored')); // prints 'nonExistentKey'

typescript only allows any and never coercion to string, but it doesn't do this with function objects or any other type. therefore, snab typings preclude treating a raw i18n functor as a VNode parameter. so within any snabbdom builder, you must call the function object or it won't compile

[ornicar]

I'm not quite sure we want this just yet. Will keep the PR in reserve for later.

[schlawg]

It's a response to the issue you raised about javascript based i18n and exceptions, but I don't like it either.

[schlawg]

i can't really commit to keeping it around on github.com/schlawg as i don't think twice about warnings on git push -d for anything older than 2 weeks. should i move it to github.com/lichess-org or can we just close it?

[ornicar]

#16378