refactor: reorganize all components (#8303)

src/tab/Tab.tsx

@@ -1,6 +1,15 @@
-import { ref, watch, nextTick, PropType, CSSProperties } from 'vue';
+import {
+  ref,
+  watch,
+  nextTick,
+  PropType,
+  CSSProperties,
+  defineComponent,
+} from 'vue';
+
+// Utils
 import { createNamespace, UnknownProp } from '../utils';
-import { TABS_KEY, TabsProvide } from '../tabs';
+import { TABS_KEY, TabsProvide } from '../tabs/Tabs';
 
 // Composables
 import { useParent } from '@vant/use';
@@ -9,9 +18,11 @@ import { routeProps } from '../composables/use-route';
 // Components
 import SwipeItem from '../swipe-item';
 
-const [createComponent, bem] = createNamespace('tab');
+const [name, bem] = createNamespace('tab');
+
+export default defineComponent({
+  name,
 
-export default createComponent({
   props: {
     ...routeProps,
     dot: Boolean,

src/tab/index.ts

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