feat: Integrated Stream asset and Kai animation system

main/vibe_main.script

@@ -0,0 +1,17 @@
+-- One-file "vibe" bootstrap: spawns grass + water + Kai (no gameplay code)
+
+local function v3(x, y, z)
+	return vmath.vector3(x or 0, y or 0, z or 0)
+end
+
+function init(self)
+	-- Bottom water strip
+	factory.create("#water_factory", v3(0, 0, 0))
+
+	-- Grass platform above water (water image is 444px tall)
+	factory.create("#grass_factory", v3(0, 444, 0))
+
+	-- Kai on the grass (roughly centered on a 4-tile wide grass strip: 4 * 512 = 2048)
+	-- Place him a bit above the grass seam so feet sit on the platform.
+	factory.create("#kai_factory", v3(1024, 560, 0))
+end