add: world config (wind, graphics, terrain, fog)

src/data/world/graphicsConfig.ts

@@ -0,0 +1,13 @@
+export const GRAPHICS_DEFAULTS = {
+  dynamicGrass: true,
+  dynamicTrees: true,
+  dynamicClouds: true,
+  shadowsEnabled: true,
+  grassDensity: 1.0,
+};
+
+export const GRAPHICS_BOUNDS = {
+  grassDensity: { min: 0.1, max: 2.0, step: 0.1 },
+};
+
+export type GraphicsState = typeof GRAPHICS_DEFAULTS;