equals method
Checks whether the given object is logically equivalent to this annotation.
Logical equivalence means:
- Same runtime _type (implements same annotation interface)
- All fields/members of both annotations are equal
Value comparison rules:
- Primitive types: compared via ==
- double/- float: compared via- .equals, treating- NaN == NaN, and- 0.0 != -0.0
- Strings, Classes, Enums, and other annotations: compared via .equals
- Arrays: compared via deep equality (like ListEquality) for respective element types
Returns true if equivalent, false otherwise.
Implementation
bool equals(Object other) {
  return this == other;
}