docs: Update flutter full-screen API and event listeners

docs/mobile-sdk/flutter-sdk/player-events.md

@@ -34,4 +34,18 @@ The listener will trigger updates to the following properties of the TPStreamsPl
 - **isEnded:** true if the video has played to the end.
 - **error:** Provides error information if an error occurs during playback.
 
-Simply use controller.value.property to access the current state values in the listener.
+Simply use controller.value.property to access the current state values in the listener.
+
+### Fullscreen Callbacks
+
+You can also listen to fullscreen-related callbacks:
+
+```dart
+_controller?.onBeforeFullScreenEnter = () {
+  // Called before entering fullscreen
+};
+
+_controller?.onBeforeFullScreenExit = () {
+  // Called before exiting fullscreen
+};
+```

docs/mobile-sdk/flutter-sdk/player-methods.md

@@ -98,6 +98,34 @@ Fetches the current playback position of the video.
 Duration currentTime = await controller.getCurrentTime();
 ```
 
+### Enter Fullscreen
+
+```dart
+Future<void> enterFullScreen()
+```
+
+Enters fullscreen mode programmatically, providing a fully immersive viewing experience.
+
+**Example Usage:**
+
+```dart
+await controller.enterFullScreen();
+```
+
+### Exit Fullscreen
+
+```dart
+Future<void> exitFullScreen()
+```
+
+Exits fullscreen mode and returns to the normal view.
+
+**Example Usage:**
+
+```dart
+await controller.exitFullScreen();
+```
+
 ### Dispose
 
 ```dart