Complete Cocos Creator port with level bundles, themes, and tooling.

Adds level prefabs, theme assets, audio, extensions, and deployment scripts for the Unity WebGL migration.

Co-authored-by: Cursor <cursoragent@cursor.com>

extensions/plugin-import-2x/static/migrate-resources/chunks/unlit-vs.inc

@@ -0,0 +1,38 @@
+// Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
+
+precision highp float;
+
+#include <cc-local>
+#include <cc-global>
+#include <input-standard>
+#include <cc-skinning>
+
+#define CC_USE_TEXTURE CC_USE_ATTRIBUTE_UV0 && USE_DIFFUSE_TEXTURE
+
+uniform MAIN_TILING {
+  vec2 mainTiling;
+  vec2 mainOffset;
+};
+
+#if CC_USE_TEXTURE
+  out mediump vec2 v_uv0;
+#endif
+
+#if CC_USE_ATTRIBUTE_COLOR
+  out lowp vec4 v_color;
+#endif
+
+void main () {
+  StandardVertInput In;
+  CCVertInput(In);
+
+  #if CC_USE_ATTRIBUTE_COLOR
+    v_color = In.color;
+  #endif
+
+  #if CC_USE_TEXTURE
+    v_uv0 = In.uv * mainTiling + mainOffset;
+  #endif
+
+  gl_Position = cc_matViewProj * cc_matWorld * In.position;
+}