feat: 新增多语言README并优化文档结构

新增德语、俄语、韩语、繁体中文多语言README，英文与简体中文README同步优化，统一下载链接与徽章样式，完善多语言入口。提升国际化支持与文档可读性。

src/components/ui/popover/PopoverAnchor.vue

@@ -1,15 +1,12 @@
-<script setup lang="ts">
-import type { PopoverAnchorProps } from "reka-ui"
-import { PopoverAnchor } from "reka-ui"
-
-const props = defineProps<PopoverAnchorProps>()
-</script>
-
 <template>
-  <PopoverAnchor
-    data-slot="popover-anchor"
-    v-bind="props"
-  >
+  <PopoverAnchor data-slot="popover-anchor" v-bind="props">
     <slot />
   </PopoverAnchor>
 </template>
+
+<script setup lang="ts">
+  import type { PopoverAnchorProps } from 'reka-ui'
+  import { PopoverAnchor } from 'reka-ui'
+
+  const props = defineProps<PopoverAnchorProps>()
+</script>