fix(TabView): respect user-supplied tabBarHidden

[spokodev]

Closes #521.

tabBarHidden is wired natively (SwiftUI .hideTabBar(props.tabBarHidden), landed in #76) but the JS wrapper in packages/react-native-bottom-tabs/src/TabView.tsx hardcoded tabBarHidden={!!renderCustomTabBar} after the {...props} spread, so any caller-supplied value was overwritten before it reached NativeTabView. The prop was also absent from the Props<Route> interface so it never surfaced at the type level either.

This PR:

• adds tabBarHidden?: boolean to the TabView Props<Route> interface with a JSDoc note that explains the default and the iOS 26+ use case from the issue
• destructures it from the function parameters alongside the other named props
• keeps the existing !!renderCustomTabBar behavior as the fallback when the caller does not pass a value (tabBarHidden ?? !!renderCustomTabBar)

Effect:

• callers can now set <TabView ... tabBarHidden={true} /> to hide the native bar without rendering a custom tabBar, which is what the issue needs on iOS 26 where the UITabBar.isHidden workarounds from outside React Native no longer reach the SwiftUI-backed bar
• callers that do not pass tabBarHidden get the same behavior as before (hidden iff tabBar is provided)
• TypeScript users see the prop in IntelliSense and on the public type

Verification:

• tsc -b clean on the package
• eslint packages/react-native-bottom-tabs/src/TabView.tsx reports only the pre-existing no-shadow warning on loaded (line 293), unrelated to this change
• existing jest setup in this repo is it.todo('write a test') and yarn test fails on main due to Flow type syntax in react-native/jest/setup.js, so a behavioural test would require fixing the jest config first which is outside the scope of this PR
• changeset added: .changeset/respect-user-tab-bar-hidden.md (react-native-bottom-tabs: patch)

Out of scope:

• the React Navigation adapter package (@bottom-tabs/react-navigation) does not reference tabBarHidden, so the <Tabs.Navigator tabBarHidden={shouldHide}> mention in the issue would need a separate change in that package's screen-options forwarding

[thiagobrez]

Please add the default false value 🙏🏻

Suggested change

	tabBarHidden,
	tabBarHidden = false,

[thiagobrez]

No need for such a big wall of text, let's keep it simple

Suggested change

	/**
	* Whether to hide the native tab bar. Defaults to `true` when a custom
	* `tabBar` is provided (so the native bar does not stack on top of the
	* custom one), otherwise `false`. Set explicitly to override the default,
	* which is required on iOS 26+ where `UITabBar.isHidden` workarounds from
	* outside React Native no longer reach the SwiftUI-backed tab bar.
	*/
	/**
	* Whether to hide the native tab bar.
	*/

[thiagobrez]

Same here, we don't need the whole explanation on the changelogs

Suggested change

Respect user-supplied `tabBarHidden` on `TabView`. The prop was wired natively but the JS wrapper hardcoded `tabBarHidden={!!renderCustomTabBar}` after the `{...props}` spread, so any user value was silently overwritten. The prop is now declared on the public `TabView` API and only falls back to the custom-tab-bar default when the caller omits it, which lets iOS 26+ users hide the SwiftUI-backed tab bar from JS again.

Respect user-supplied `tabBarHidden` on `TabView`.

[thiagobrez]

Thanks @spokodev! Left some easy comments. If you can fix them and mark the PR as ready, we can merge soon!