[5.4] Replace symfony's translator

[themsaid]

Laravel uses its own Translator in most of the situations, the only part where we use Symfony's translator is in trans_choice().

This PR adds a replacement to the MessageSelector class used in trans_choice() and removes all instances of Symfony's translator from the code base.

The new MessageSelector supports the same basic functionality supported by Symfony's with some slight changes to the syntax:

• [1,Inf] is now [1,*]
• Added support for [*,5]
• Removed one:one record|many: many records support, it'll match in this order by default.

[kamui545]

Hey nice work, it reminds me of an issue I opened last year.

#9584

I think you can also remove the $domain param from the helper functions as I stated on the previous issue.

[themsaid]

@kamui545 yeah good catch, updated :)
Thanks

[garygreen]

Looks awesome, nice work 😄

[Skysplit]

I think that translator contract should also implement has and get methods. get is being used in Validator.php and as we do not rely on implemenation, but interface, we should actually use only methods that are provided by interface. has would be just nice addition to get.

[cjmaxik]

So, all plural rules from https://github.com/symfony/translation/blob/master/PluralizationRules.php isn't applicable now. Most of the translations are broken. Thanks...

[kamui545]

@cjmaxik Could you provide a way to reproduce your issue? That would be helpful.

[cjmaxik]

en

'apples' => ':count apple|:count apples',

1 apple | 2 apples | 24 apples | 2657 apples

ru

'apples' => ':count яблоко|:count яблока|:count яблок',

Should be 1 яблоко | 2 яблока | 24 яблока | 2657 яблок
Returns 1 яблоко | 2 яблока | 24 яблока | 2657 яблока

There is more plural rules then one|many.

[symbios-zi]

@themsaid Why did you break plurals for Russian language? I guess not the only Russian plurals were broken.
Please look at https://github.com/symfony/translation/blob/master/PluralizationRules.php