+ Missing dictionary utility functions

[gusty]

There were several missing utility functions for dictionary-like data structures. This PR includes:

• Additional helper functions for types that implement dictionary-like interfaces (IDictionary, Map, etc.)
• Enhanced support for common dictionary operations that were previously missing from the library
• Improved consistency in the API surface area for dict-like types
• Internal re-use of such helper functions, improving readability of existing code

This PR fills gaps in the dictionary/map function coverage, making the library more complete and consistent for developers working with key-value data structures.