Enum support

[rick-bongers]

This pull request enhances enum type handling in the Types class to improve how PHP enums are converted for TypeScript type generation. The most important changes are the addition of support for BackedEnum instances and a new method for processing enums.

Enum type handling improvements:

• Updated the determineType method in src/Types/Types.php to handle values that are instances of \BackedEnum, delegating their processing to the new processEnum method.
• Added a new private method processEnum in src/Types/Types.php that generates a TypeScript union type string from all possible enum values, properly quoting string values.

[mikemeijer]

Can you extend the tests?

[Lukasss93]

any news about this?

[rick-bongers]

Hi @mxaGianluca, I’d love to contribute more to this package, but I noticed it has been a bit quiet lately. Are there plans to actively maintain this project going forward? I'm happy to help out where I can.

[mxaGianluca]

Hi @rick-bongers thank you for this PR. I've been too busy and haven't checked it out yet. But I do intend on maintaining this package.

I'll get back to you once I've checked it out.

[mxaGianluca]

Hey @rick-bongers i've just looked at your commits and I want to merge them but the tests are failing. The assertions aren't correct.

Tests\Types\TypesTest > it can determine a type from a value with (Vagebond\Runtype\Tests\Fakes\Enums\TestEnum…    
  Failed asserting that two strings are identical.
  -'enum-value-1 | enum-value-2'
  +''enum-value-1' | 'enum-value-2''
  

  at tests/Types/TypesTest.php:9
      5▕ use Vagebond\Runtype\Tests\Fakes\Resources\ProductResource;
      6▕ use Vagebond\Runtype\Types\Types;
      7▕ 
      8▕ it('can determine a type from a value', function ($value, $expected) {
  ➜   9▕     expect((new Types(getConfig()))->determineType($value))->toBe($expected);
     10▕ })->with([
     11▕     ['string', 'string'],
     12▕     [true, 'boolean'],
     13▕     [1, 'number'],

  1   tests/Types/TypesTest.php:9

[rick-bongers]

@mxaGianluca my mistake! I've fixed the tests

[mxaGianluca]

Thank you for your contribution @rick-bongers.