Streamline trait implementations for `Currency` and `NativeCurrency` by removing redundant methods and consolidating logic. Adjust various currency-related entities (`Ether`, `Token`) to align with these changes, ensuring consistency and reducing code duplication.

Consolidated the `Currency` trait implementations using macros for `Ether`, `Token`, and `CurrencyLike` types. This reduces code duplication and improves maintainability. The macros now handle trait method definitions for multiple types.