Initial pipeline abstraction

Source/Render/Pipeline/VertexState.rs

@@ -0,0 +1,16 @@
+use crate::Render::VertexBufferLayout;
+use crate::Shader::Shader;
+use std::borrow::Cow;
+
+#[derive(Clone, Debug)]
+pub struct VertexState {
+    /// The compiled shader module for this stage.
+    pub shader: Cow<'static, Shader>,
+
+    /// The name of the entry point in the compiled shader. There must be a function that returns
+    /// void with this name in the shader.
+    pub entry_point: &'static str,
+
+    /// The format of any vertex buffers used with this pipeline.
+    pub buffers: Cow<'static, [VertexBufferLayout]>,
+}