Improve LibVLC stability and add external playback host

- Add LibVLCManager singleton for safer LibVLC lifetime management
- Introduce VlcHostClient and VlcHost.exe for external playback via JSON commands
- Enhance VideoPlayer with error recovery and dependency property for SourceUrl
- Implement IDisposable in ProgramsData and ViewModels for better cleanup
- Update NuGet packages: LibVLCSharp to 3.9.6, System.Reactive to 6.1.0
- Add robust error handling and resource disposal throughout
- Improve program guide handling in PlayerViewModel

TV Player WPF/ViewModels/TVPlayerViewModel.cs

@@ -188,6 +188,19 @@ namespace TV_Player.ViewModels
         {
             if (_mainViewModel.Control is IDisposable disposable)
                 disposable.Dispose();
+
+            if (PlayListsData != null)
+            {
+                foreach (var kv in PlayListsData)
+                {
+                    try { kv.Value.Dispose(); } catch { }
+                }
+                PlayListsData.Clear();
+            }
+            if (CurrentProgrmsData != null)
+            {
+                try { CurrentProgrmsData.Dispose(); } catch { }
+            }
         }
     }
 }