refactor: reorganize all components (#8303)

src/switch/Switch.tsx

@@ -1,10 +1,13 @@
+import { defineComponent } from 'vue';
 import { createNamespace, addUnit, UnknownProp } from '../utils';
 import { useLinkField } from '../composables/use-link-field';
 import Loading from '../loading';
 
-const [createComponent, bem] = createNamespace('switch');
+const [name, bem] = createNamespace('switch');
+
+export default defineComponent({
+  name,
 
-export default createComponent({
   props: {
     size: [Number, String],
     loading: Boolean,

src/switch/index.ts

@@ -0,0 +1,7 @@
+import { installable } from '../utils';
+import _Switch from './Switch';
+
+const Switch = installable(_Switch);
+
+export default Switch;
+export { Switch };