[WIP] Translator afterResolve event

[jaxwilko]

Adds a new event that gets fired after an a translation has been resolved. Acts identically to beforeResolve except for it also passes the found line into the event, allowing for modifications to be made and fallback handlers for missing lines to be created.

Example:

Event::listen(
    'translator.afterResolve',
    function (string $key, array $replace, ?string $line, ?string $locale) {
        // handle things 
        return $someVar;
    }
);