feat: enable media display options by default

- Set fullWidthImages default to true
- Set renderVideoLinksAsEmbeds default to true
- Users now get enhanced media experience out of the box
- Can still be disabled in settings if preferred

src/components/Settings.tsx

@@ -40,8 +40,8 @@ const DEFAULT_SETTINGS: UserSettings = {
   useLocalRelayAsCache: true,
   rebroadcastToAllRelays: false,
   paragraphAlignment: 'justify',
-  fullWidthImages: false,
-  renderVideoLinksAsEmbeds: false,
+  fullWidthImages: true,
+  renderVideoLinksAsEmbeds: true,
   syncReadingPosition: true,
   autoMarkAsReadOnCompletion: false,
   hideBookmarksWithoutCreationDate: true,