Add backup export and local artwork storage

src/Jellyfin.Plugin.Multilang/Plugin.cs

@@ -1,5 +1,6 @@
 using System.Globalization;
 using Jellyfin.Plugin.Multilang.Configuration;
+using Jellyfin.Plugin.Multilang.Services.Injection;
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Common.Plugins;
 using MediaBrowser.Model.Plugins;
@@ -21,6 +22,23 @@ public sealed class Plugin : BasePlugin<PluginConfiguration>, IHasWebPages
 
     public override Guid Id => Guid.Parse("9d7c61a5-7a1b-4d1e-9b79-4c8c6d2e8a2a");
 
+    public override void OnUninstalling()
+    {
+        WebScriptInjector.RemoveInjected(ApplicationPaths.WebPath);
+
+        if (Configuration.CleanupDataOnUninstall)
+        {
+            var dataDir = Path.Combine(ApplicationPaths.DataPath, "multilang");
+            if (Directory.Exists(dataDir))
+                Directory.Delete(dataDir, recursive: true);
+
+            if (File.Exists(ConfigurationFilePath))
+                File.Delete(ConfigurationFilePath);
+        }
+
+        base.OnUninstalling();
+    }
+
     public IEnumerable<PluginPageInfo> GetPages()
     {
         yield return new PluginPageInfo