docs: rework template and add stages framework

docs/design/iowo-design.typ

@@ -0,0 +1,31 @@
+#import "../template.typ": conf
+#import "graphics.typ"
+
+#show: conf.with(title: [iOwO design], subtitle: [don't worry, we're just dreaming])
+#show ">": graphics.arrow()
+
+= Type data model
+
+== Requirements
+
+- Color-aware
+	- It can handle colors and colorspaces for images
+	- ocio????
+- number/number type support
+- custom types (structs/enums)
+- algebraic enums
+- traits (`Numeric`...)
+
+= Execution stages
+
+#graphics.stages-overview
+
+== Source > Graph IR
+
+== Graph IR > VM Bytecode
+
+=== Optimizer
+
+=== Compiler
+
+== VM Bytecode > VM