feat(locale): introduce 'Locale' component

[azjezz]

No description provided.

[azjezz]

The cases for this enum were mostly generated using a script, we could add more in the future.

[veewee]

Would it make sense to include said script and check from time to time that new locales are added automatically?

[azjezz]

This is what I used actually, but had to go over the result manually and update some names as they contained non-ASCII characters.

I think it would be nice to have a nice script for this in the future, but I don't see the value on having this in the repo.

foreach (\ResourceBundle::getLocales('') as $locale) {
    $name = \Locale::getDisplayName($locale, 'en');
    $name = \Psl\Str\replace_every($name, [
        '(' => '',
        ')' => '',
        '[' => '',
        ']' => '',
        ',' => '',
        '.' => '',
        '&' => '',
        '-' => '',
        ' ' => '',
    ]);

    echo 'case ' . $name . ' = "' . $locale . '";' . PHP_EOL;
}

[coveralls]

Pull Request Test Coverage Report for Build 8338640735

Details

• 8 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.001%) to 99.015%

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Totals
Change from base Build 8045710476:	0.001%
Covered Lines:	4224
Relevant Lines:	4266

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💛 - Coveralls

[veewee]

LGTM 🚢