Feat: Add return union types support

[abetwothree]

Summary

This PR adds support for return union types. E.g. returning: string|int|null would make the TS file would have string | number | null as the type.

Problem

Previously, having a PHP union return type gets converted to unknown as the return type.

This:

protected function scoreNullable(): Attribute
{
    return Attribute::get(fn (): float|int|null => null);
}

Becomes this:

score_nullable: unknown

That causes some issues in TypeScript code expecting a more properly defined type.

Solution

This PR adds a section to handle when the reflection return type is ReflectionUnionType and loop through each return type to map them to TypeScript

• src/Actions/WriteColumnAttribute.php

Tests

Tests have been added and updated existing expectations to keep previous tests working.

Thank you!

[tcampbPPU]

TIL ReflectionUnionType
TY ❤️