Refactor: standardize namespace and using directive style

Refactored all C# test files to use explicit namespace declarations and moved all using directives inside the namespace block for consistency. Updated assembly info and cache files to reflect the new build. Adjusted MvcTestingAppManifest.json to use fully qualified assembly names. No functional changes; all updates are related to code style, organization, and project metadata.

MediaBrowser.Common/Plugins/BasePlugin.cs

@@ -2,15 +2,15 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-#nullable disable
-
-using System;
-using System.IO;
-using System.Reflection;
-using MediaBrowser.Model.Plugins;
-
 namespace MediaBrowser.Common.Plugins
 {
+#nullable disable
+
+    using System;
+    using System.IO;
+    using System.Reflection;
+    using MediaBrowser.Model.Plugins;
+
     /// <summary>
     /// Provides a common base class for all plugins.
     /// </summary>

MediaBrowser.Common/Plugins/IHasPluginConfiguration.cs

@@ -2,11 +2,11 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-using System;
-using MediaBrowser.Model.Plugins;
-
 namespace MediaBrowser.Common.Plugins
 {
+    using System;
+    using MediaBrowser.Model.Plugins;
+
     /// <summary>
     /// Defines the <see cref="IHasPluginConfiguration" />.
     /// </summary>

MediaBrowser.Common/Plugins/IPlugin.cs

@@ -2,13 +2,13 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-#nullable disable
-
-using System;
-using MediaBrowser.Model.Plugins;
-
 namespace MediaBrowser.Common.Plugins
 {
+#nullable disable
+
+    using System;
+    using MediaBrowser.Model.Plugins;
+
     /// <summary>
     /// Defines the <see cref="IPlugin" />.
     /// </summary>

MediaBrowser.Common/Plugins/IPluginManager.cs

@@ -2,16 +2,16 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
-using System.Reflection;
-using System.Threading.Tasks;
-using MediaBrowser.Model.Plugins;
-using MediaBrowser.Model.Updates;
-using Microsoft.Extensions.DependencyInjection;
-
 namespace MediaBrowser.Common.Plugins
 {
+    using System;
+    using System.Collections.Generic;
+    using System.Reflection;
+    using System.Threading.Tasks;
+    using MediaBrowser.Model.Plugins;
+    using MediaBrowser.Model.Updates;
+    using Microsoft.Extensions.DependencyInjection;
+
     /// <summary>
     /// Defines the <see cref="IPluginManager" />.
     /// </summary>

MediaBrowser.Common/Plugins/LocalPlugin.cs

@@ -2,12 +2,12 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
-using MediaBrowser.Model.Plugins;
-
 namespace MediaBrowser.Common.Plugins
 {
+    using System;
+    using System.Collections.Generic;
+    using MediaBrowser.Model.Plugins;
+
     /// <summary>
     /// Local plugin class.
     /// </summary>

MediaBrowser.Common/Plugins/PluginManifest.cs

@@ -2,13 +2,13 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
-using System.Text.Json.Serialization;
-using MediaBrowser.Model.Plugins;
-
 namespace MediaBrowser.Common.Plugins
 {
+    using System;
+    using System.Collections.Generic;
+    using System.Text.Json.Serialization;
+    using MediaBrowser.Model.Plugins;
+
     /// <summary>
     /// Defines a Plugin manifest file.
     /// </summary>