perf: improve the usage documentation of vben-vxe-table (#4829)

* perf: improve the usage documentation of vben-vxe-table

docs/src/_env/node/adapter/form.ts

@@ -0,0 +1,4 @@
+export const useVbenForm = () => {};
+export const z = {};
+export type VbenFormSchema = any;
+export type VbenFormProps = any;

docs/src/_env/node/adapter/vxe-table.ts

@@ -0,0 +1,3 @@
+export type * from '@vben/plugins/vxe-table';
+
+export const useVbenVxeGrid = () => {};