refactor(core): rename core pkg dir to core

packages/core/src/composables/useWindow.ts

@@ -0,0 +1,6 @@
+type UseWindow = Window & typeof globalThis & { chrome?: any }
+
+export default (): UseWindow => {
+  if (typeof window !== 'undefined') return window as UseWindow
+  else return { chrome: false } as UseWindow
+}