Add option to delete media (#1014)

## Description
Adds a setting to enable "Media management" which adds a context menu
item to delete media. This is accessible using either the More button or
long clicking.

You can delete episodes, seasons, series and movies/videos.

If order for the option to appear the current user must have server-side
settings for "Allow media deletion from" enabled for the library and the
in-app setting under Settings->Advanced Settings->"Show media management
options".

### Related issues
Closes #104 

### Testing
Emulator

## Screenshots
### Context menu
![delete_context_2
Large](https://github.com/user-attachments/assets/cabc3c24-1b43-4f88-8d71-b7275f9eadc4)


### Confirmation
![delete_confirm
Large](https://github.com/user-attachments/assets/8036dde1-8a51-424b-bbdd-f2826dd3e0ab)

## AI or LLM usage
None

app/src/main/java/com/github/damontecres/wholphin/preferences/AppPreference.kt

@@ -741,6 +741,18 @@ sealed interface AppPreference<Pref, T> {
                 valueToIndex = { it.number },
             )
 
+        val ManageMedia =
+            AppSwitchPreference<AppPreferences>(
+                title = R.string.show_media_management,
+                defaultValue = false,
+                getter = { it.interfacePreferences.enableMediaManagement },
+                setter = { prefs, value ->
+                    prefs.updateInterfacePreferences { enableMediaManagement = value }
+                },
+                summaryOn = R.string.enabled,
+                summaryOff = R.string.disabled,
+            )
+
         val OneClickPause =
             AppSwitchPreference<AppPreferences>(
                 title = R.string.one_click_pause,
@@ -1110,6 +1122,7 @@ val advancedPreferences =
                 preferences =
                     listOf(
                         AppPreference.ShowClock,
+                        AppPreference.ManageMedia,
                         AppPreference.CombineContinueNext,
                         // Temporarily disabled, see https://github.com/damontecres/Wholphin/pull/127#issuecomment-3478058418
 //                    AppPreference.NavDrawerSwitchOnFocus,