feat(tools): skin.mjs 资源清单与 override 校验

框架文件树即可覆盖清单(不另建清单文件)。孤儿/尺寸不一致/Spine 缺件
一律报错中止, 不静默跳过。Spine 贴图豁免尺寸校验(坐标在 .atlas 内)。

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

cocoscreator_projects/scripts/lib/paths.mjs

@@ -8,6 +8,13 @@ export const HOST_PROJECT = join(ROOT, 'YouleNexus');
 export const FRAMEWORK_SRC = join(HOST_PROJECT, 'assets', 'framework');
 export const GAMES_DIR = join(ROOT, 'games');
 export const SEED_DIR = join(ROOT, 'templates', 'game-seed');
+export const FRAMEWORK_UI_DIR = join(FRAMEWORK_SRC, 'ui');
+export const BUILD_WORKSPACE = join(ROOT, 'build-workspace');
+
+// 子游戏的皮肤覆盖目录
+export function gameOverrideDir(projectDir) {
+  return join(projectDir, 'assets', 'game', 'override');
+}
 
 export function readCreatorVersion(projectDir) {
   try {