[iOS] Allow Custom Theme for Bottom Tabs

[YilmazGursoy]

Description

Currently, the bottom tabs theme in iOS changes based on the system appearance (light/dark mode). I would like to have the ability to override this behavior and set a custom theme externally.

Feature Request

Add support for explicitly setting the bottom tabs theme on iOS to:

Light Translucent
Dark Translucent
This will allow more flexibility in theming, independent of the system appearance. (This request is only for iOS, as Android does not have this feature.)

Expected Behavior

Developers should be able to set a preferred theme via an exposed API or configuration option.
The bottom tabs should respect this custom setting instead of only following the system theme.
Use Case

This feature would be useful for applications that have their own theming logic and do not rely entirely on system settings.

Possible Implementation

Introduce a new property (e.g., bottomTabsTheme) that allows setting the theme manually on iOS.
Support lightTranslucent and darkTranslucent values in addition to the current system-driven behavior.

Let me know if I can provide further details! 🚀