Refactoring Rendering backend

Ghost.Shader/PsoOptions.cs

@@ -0,0 +1,35 @@
+namespace Ghost.Shader;
+
+public enum ZTestOptions
+{
+    Disabled,
+    Less,
+    LessEqual,
+    Equal,
+    GreaterEqual,
+    Greater,
+    NotEqual,
+    Always
+}
+
+public enum ZWriteOptions
+{
+    Off,
+    On
+}
+
+public enum CullOptions
+{
+    Off,
+    Front,
+    Back
+}
+
+public enum BlendOptions
+{
+    Opaque,
+    Alpha,
+    Additive,
+    Multiply,
+    PremultipliedAlpha
+}