Add node graph mockup to website

docs/design/node-data.md

@@ -0,0 +1,24 @@
+Data can **flow** or **composite**.
+
+# Types
+Data types in Rust.
+
+- Color - A color description freely convertible between color models and color spaces.
+- Raster - A monadic data format that allows a color to be sampled at any rectangle position.
+<!-- - CSG - Constructive Solid Geometry. What's inside and outside of a shape. -->
+<!-- - SDF - Signed Distance Field. Distance from the surface of a CSG. -->
+
+# Table Archetypes
+A set of standard named columns in a table of specific type(s), where some can be optional.
+
+- XY - A vector2 (2D vector).  
+ `X`: number, `Y`: number
+
+- XYZ - A vector3 (3D vector).  
+  `X`: number, `Y`: number, `Z`: number
+
+- XYZW - A vector4 (4D vector).  
+  `X`: number, `Y`: number, `Z`: number, `W`: number
+
+- Trace - Sequence of points in 2D or (rarely) 3D space. Often recorded as mouse or stylus movements where time is seconds since the stroke began.  
+  `X`: number, `Y`: number, `Z?`: number, `Pressure?`: number, `Pitch?`: number, `Roll?`: number, `Yaw?`: number, `Time?`: number