Implemented plugin installer

Moonlight/App/ApiClients/Modrinth/ModrinthException.cs

@@ -0,0 +1,19 @@
+namespace Moonlight.App.ApiClients.Modrinth;
+
+public class ModrinthException : Exception
+{
+    public int StatusCode { get; set; }
+    
+    public ModrinthException()
+    {
+    }
+
+    public ModrinthException(string message, int statusCode) : base(message)
+    {
+        StatusCode = statusCode;
+    }
+
+    public ModrinthException(string message, Exception inner) : base(message, inner)
+    {
+    }
+}