begin implementing quotes repository and controller

server/Models/QuoteFilter.cs

@@ -0,0 +1,10 @@
+namespace server.Models
+{
+    public class QuoteFilter
+    {
+        /// <summary>
+        /// Use to filter quote by narrator.
+        /// </summary>
+        public string? Narrator { get; set; } = null;
+    }
+}