isokit: project layer, Studio GUI, MCP server, viewer, CLI, demo project and docs

examples/demo/theme.toml

@@ -0,0 +1,9 @@
+# Demo theme: adds a brick material on top of the built-in theme.
+[palette.dark]
+brick = "#8a4f3e"
+
+[palette.light]
+brick = "#b8664c"
+
+[materials]
+brick = "brick"