Added builder

Added shader importer

Nerfed.Builder/Packager/PackageArgs.cs

@@ -0,0 +1,6 @@
+namespace Nerfed.Builder;
+
+public class PackageArgs
+{
+    
+}

Nerfed.Builder/Packager/Packager.cs

@@ -0,0 +1,12 @@
+namespace Nerfed.Builder;
+
+public class Packager : IDisposable
+{
+    public void Run(PackageArgs args)
+    {
+    }
+
+    public void Dispose()
+    {
+    }
+}