Refactor: replace direct use of ExtendedEnumMeta with ExtendedEnum class

[mrDzurb]

Summary

Previously, every enum-like class had metaclass=ExtendedEnumMeta applied directly. This PR introduces a unified ExtendedEnum base class (which itself uses ExtendedEnumMeta) and updates all references to inherit from ExtendedEnum instead.

Benefits

• Reduces repetition by centralizing the metaclass logic in ExtendedEnum.
• All enum-like classes now share the same structure and behaviors.
• Future updates to the metaclass functionality only need to happen in one place, making it easier to maintain and extend.

Changes

• Added a new ExtendedEnum base class with metaclass=ExtendedEnumMeta.
• Updated all existing classes using metaclass=ExtendedEnumMeta to inherit from ExtendedEnum instead.
• Removed direct references to metaclass=ExtendedEnumMeta on child classes.

If any additional specialized behavior is needed, it can be added in the ExtendedEnum class.

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[VipulMascarenhas]

lgtm 👍

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