Add support for multiple arguments using arrays in eval

[thekid]

Change

Currently, we can only supply one annotation argument via eval:

#[Callback(eval: 'fn() => ...')]
class T { }

Reflection::type(T::class)->annotation(Callback::class)->argument(0); // Closure

This pull request add support for multiple arguments by passing an array:

#[Callbacks(eval: ['fn() => 1', 'fn() => 2'])]
class T { }

Reflection::type(T::class)->annotation(Callbacks::class)->arguments(); // [Closure#1, Closure#2]

It also supports named arguments:

#[Callback(eval: ['function' => 'fn() => ...'])]
class T { }

Reflection::type(T::class)->annotation(Callback::class)->argument('function'); // Closure

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Together with xp-framework/core#324, this is a prerequisite for extracting reflection code as proposed by xp-framework/rfc#338.

[thekid]

Released in https://github.com/xp-framework/reflection/releases/tag/v2.12.0