Improve scoped service

Toolkit.Foundation/FileProvider.cs

@@ -0,0 +1,27 @@
+namespace Toolkit.Foundation;
+
+public class FileProvider :
+    IFileProvider
+{
+    public IReadOnlyCollection<string> Get(string path,
+        FileProviderFilter filter)
+    {
+        if (!Directory.Exists(path))
+        {
+            return [];
+        }
+
+        List<string> searchPatterns = filter.Extensions.Count > 0
+            ? filter.Extensions.Select(ext => $"*.{ext}").ToList()
+            : ["*.*"];
+
+        List<string> files = [];
+
+        foreach (string pattern in searchPatterns)
+        {
+            files.AddRange(Directory.EnumerateFiles(path, pattern, SearchOption.TopDirectoryOnly));
+        }
+
+        return files;
+    }
+}