pub fn get_attribute_documentation(attr: &str) -> Option<BuiltinDoc>Expand description
Get documentation for a Perl subroutine or variable attribute.
Attributes are declared with :name syntax, e.g. sub foo :lvalue { ... }.
Pass the attribute name without the leading colon.
Returns signature and description suitable for LSP hover display,
or None if the attribute is not a known built-in.