Added an option to use the native fullscreen of a browser in webapps

[JuggerbAUT]

This PR introduces native web fullscreen support to provide a more immersive video playback experience in web browsers.

Problem

Currently, the fullscreen mode in chewie on web has some limitations:

• Browser UI remains visible: When entering fullscreen, browser elements like the address bar and tabs are still visible, which is not a true fullscreen experience.
• Constrained by parent containers: in a width restriced webapp the fullscreen mode of the player is also restricted -> removing this restriction with a variable set in a provider leads to problems with the player notifier

Solution

useNativeWebFullscreen flag: A new boolean flag, useNativeWebFullscreen, has been added to ChewieController. This flag is true by default. When set to false, it reverts to the original fullscreen behavior.