Added Static Method to Account Class for Key Validation

[digimbyte]

Introduced a validateKey static method in the Account class that validates a string input and returns its type if valid, or void/undefined if invalid. This method streamlines validation by reducing the need for try/catch blocks and complex conditional checks, providing a clear and direct approach for assessing the health status of a string input.

[snowypowers]

unit tests?

[digimbyte]

@snowypowers thanks for looking at it, I wrote it mid project while juggling other code
upgraded to enums per requested and fixed a few missing elements.
should resolve with falsely values