docs: add vxe-table doc (#4807)

* docs: init vxe-table demos

* style: fix vxe-table index.scss import error

* docs: fix vxe-table style & theme toggle problem

* docs: add rest demos

* docs: add vxe-table demo desc

* fix: add maximumFileSizeToCacheInBytes to fix build error

* fix: fix vxe-table set-theme build error

* docs: fix vitepress ssr render problem

* docs: add some tips for vitepress compatibility

docs/src/demos/vben-vxe-table/mock-api.ts

@@ -0,0 +1,36 @@
+import { MOCK_API_DATA } from './table-data';
+
+export namespace DemoTableApi {
+  export interface PageFetchParams {
+    [key: string]: any;
+    page: number;
+    pageSize: number;
+  }
+}
+
+export function sleep(time = 1000) {
+  return new Promise((resolve) => {
+    setTimeout(() => {
+      resolve(true);
+    }, time);
+  });
+}
+
+/**
+ * 获取示例表格数据
+ */
+async function getExampleTableApi(params: DemoTableApi.PageFetchParams) {
+  return new Promise<{ items: any; total: number }>((resolve) => {
+    const { page, pageSize } = params;
+    const items = MOCK_API_DATA.slice((page - 1) * pageSize, page * pageSize);
+
+    sleep(1000).then(() => {
+      resolve({
+        total: items.length,
+        items,
+      });
+    });
+  });
+}
+
+export { getExampleTableApi };