Fix: Replace deleted addDefaultFormats() with explicit format registration (JUCE 8)

Source/HostedPluginManager.cpp

@@ -2,8 +2,13 @@
 
 HostedPluginManager::HostedPluginManager()
 {
-    // Register VST3 and AU formats
-    formatManager.addDefaultFormats();
+    // Register VST3 and AU formats explicitly (addDefaultFormats() removed in JUCE 8)
+    #if JUCE_PLUGINHOST_VST3
+    formatManager.addFormat(new juce::VST3PluginFormat());
+    #endif
+    #if JUCE_PLUGINHOST_AU
+    formatManager.addFormat(new juce::AudioUnitPluginFormat());
+    #endif
 }
 
 HostedPluginManager::~HostedPluginManager()