Started adding asset api/auto import

Moonlight.ApiServer/Helpers/PluginAssetFileProvider.cs

@@ -0,0 +1,37 @@
+using Microsoft.Extensions.FileProviders;
+using Microsoft.Extensions.FileProviders.Physical;
+using Microsoft.Extensions.Primitives;
+using Moonlight.ApiServer.Services;
+
+namespace Moonlight.ApiServer.Helpers;
+
+public class PluginAssetFileProvider : IFileProvider
+{
+    private readonly PluginService PluginService;
+
+    public PluginAssetFileProvider(PluginService pluginService)
+    {
+        PluginService = pluginService;
+    }
+
+    public IDirectoryContents GetDirectoryContents(string subpath)
+    {
+        return NotFoundDirectoryContents.Singleton;
+    }
+
+    public IFileInfo GetFileInfo(string subpath)
+    {
+        if (!PluginService.AssetMap.TryGetValue(subpath, out var physicalPath))
+            return new NotFoundFileInfo(subpath);
+        
+        if (!File.Exists(physicalPath))
+            return new NotFoundFileInfo(subpath);
+
+        return new PhysicalFileInfo(new FileInfo(physicalPath));
+    }
+
+    public IChangeToken Watch(string filter)
+    {
+        return NullChangeToken.Singleton;
+    }
+}