Refactor how annotations with non-constant arguments are emitted

[thekid]

This pull request changes the way annotations with non-constant arguments are emitted.

Single argument

// Declaration in user code
#[Verify(fn() => extension_loaded('pcntl')]

// Previous behavior
#[Verify(eval: 'fn() => extension_loaded(\'pcntl\')')]

// Code that is emitted now
#[Verify(eval: ['fn() => extension_loaded(\'pcntl\')'])]

Multiple (and named) arguments

// Declaration in user code
#[Verify(fn() => extension_loaded('pcntl'), optional: true)]

// Previous behavior created an ambiguity with supplying a single value with the respective array
#[Verify(eval: '[\'0\' => fn() => extension_loaded(\'pcntl\'), \'optional\' => true]')]

// Code that is emitted now
#[Verify(eval: ['fn() => extension_loaded(\'pcntl\'))', 'optional' => 'true'])]

The array notation is supported by the following changes:

• Add support for multiple arguments using arrays in eval reflection#35, released in 2.12.0
• Support eval array notation inside attributes core#324, released in 11.6.0

See also xp-framework/rfc#338

[thekid]

This should be moved to the parent class, it will aid the transition to using xp-framework/reflection!

[thekid]

Released in https://github.com/xp-framework/compiler/releases/tag/v8.13.0