feat(ios): replace enum import with direct string types for presentationStyle

BREAKING CHANGE: No more `NitroInAppBrowserPresentationStyle` enum import required. Use string literals directly for presentation types.

Author: patrickkabwe

example/App.tsx

@@ -15,7 +15,7 @@ const App = () => {
               barColor: 'purple',
               controlColor: '#000000',
               dismissButtonLabel: 'close',
-              presentationStyle: NitroInAppBrowserPresentationStyle.FullScreen,
+              presentationStyle: "fullScreen",
             });
           } catch (error) {
             console.error(error);

src/types.ts

@@ -1,14 +1,10 @@
 export type NitroInAppBrowserDismissButtonLabel = 'cancel' | 'done' | 'close'
 
-export enum NitroInAppBrowserPresentationStyle {
-  PageSheet = 'pageSheet',
-  FormSheet = 'formSheet',
-  FullScreen = 'fullScreen',
-}
+export type NitroInAppBrowserPresentationStyle = 'pageSheet' | 'formSheet' | 'fullScreen'
 
 export interface NitroInAppBrowserOptions {
-  dismissButtonLabel?: NitroInAppBrowserDismissButtonLabel
-  presentationStyle?: string // NitroInAppBrowserPresentationStyle
-  barColor?: string
-  controlColor?: string
+    dismissButtonLabel?: NitroInAppBrowserDismissButtonLabel
+    presentationStyle?: NitroInAppBrowserPresentationStyle
+    barColor?: string
+    controlColor?: string
 }