Added builder

Added shader importer

Nerfed.Builder/ArgumentAttribute.cs

@@ -0,0 +1,11 @@
+namespace Nerfed.Builder;
+
+public class ArgumentAttribute : Attribute
+{
+    public string ArgKey { get; }
+
+    public ArgumentAttribute(string argKey)
+    {
+        ArgKey = argKey;
+    }
+}