feat: Enhance Attribute and Message annotations with improved generics support for better type safety.

[Yi-pixel]

This helps development tools (like PhpStorm and PHPStan) correctly recognize the return types of these methods.

[Yi-pixel]

This PR still has a few issues that need to be addressed.

• Attribute::first uses the reset function, which causes an empty array to return false instead of the expected null. So we need to confirm whether we should change the implementation of first, or adjust the code in the local PR instead.