Implement Circle header, rename all files to use .hpp extension.

include/J3ML/LinearAlgebra/CoordinateFrame.hpp

@@ -0,0 +1,17 @@
+#pragma once
+
+
+#include <J3ML/LinearAlgebra/Vector3.hpp>
+
+namespace J3ML::LinearAlgebra
+{
+    /// The CFrame is fundamentally 4 vectors (position, forward, right, up vector)
+    class CoordinateFrame
+    {
+    public:
+        Vector3 Position;
+        Vector3 Front;
+        Vector3 Right;
+        Vector3 Up;
+    };
+}