[spiral/translator] Adding the ability to register additional translation directories

[msmakouz]

Q	A
Bugfix?	❌
Breaks BC?	❌
New feature?	✔️
Issues	#951

What was changed

Added the ability to register additional directories with translation files for the Translator component.
This can be useful when developing additional packages for the Spiral Framework, where the package may provide translation files (for example, validators). Translation files in an application can override translations from additional directories.

A directory with translations can be registered via the Spiral\Bootloader\I18nBootloader bootloader or translator.php configuration file.

Via I18nBootloader bootloader

use Spiral\Boot\Bootloader\Bootloader;
use Spiral\Bootloader\I18nBootloader;

final class AppBootloader extends Bootloader
{
    public function init(I18nBootloader $i18n): void
    {
        $i18n->addDirectory('some/directory');
    }
}

Via configuration file

return [
    // ...
    'directories' => [
        'some/directory'
    ],
    // ...
];

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (fe8484a) 89.43% compared to head (9cf690e) 89.43%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #996   +/-   ##
=========================================
  Coverage     89.43%   89.43%           
- Complexity     6093     6104   +11     
=========================================
  Files           801      801           
  Lines         17204    17225   +21     
=========================================
+ Hits          15386    15406   +20     
- Misses         1818     1819    +1     

Files Changed	Coverage Δ
src/Framework/Bootloader/I18nBootloader.php	100.00% <100.00%> (ø)
src/Translator/src/Catalogue/CatalogueLoader.php	96.72% <100.00%> (+0.97%)	⬆️
src/Translator/src/Config/TranslatorConfig.php	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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