refactor: migrate demo applications to playground (#4116)

* chore: detail adjustment

* refactor: Migrate demo applications to playground

* perf: logic optimization

* chore: update docs

* chore: update docs

playground/src/views/demos/features/watermark/index.vue

@@ -0,0 +1,66 @@
+<script lang="ts" setup>
+import { useWatermark } from '@vben/hooks';
+
+import { Button } from 'ant-design-vue';
+
+const { destroyWatermark, updateWatermark } = useWatermark();
+
+async function createWaterMark() {
+  await updateWatermark({
+    advancedStyle: {
+      colorStops: [
+        {
+          color: 'red',
+          offset: 0,
+        },
+        {
+          color: 'blue',
+          offset: 1,
+        },
+      ],
+      type: 'linear',
+    },
+    content: 'hello my watermark',
+    globalAlpha: 0.5,
+    gridLayoutOptions: {
+      cols: 2,
+      gap: [20, 20],
+      matrix: [
+        [1, 0],
+        [0, 1],
+      ],
+      rows: 2,
+    },
+    height: 200,
+    layout: 'grid',
+    rotate: 22,
+    width: 200,
+  });
+}
+</script>
+
+<template>
+  <div class="p-5">
+    <div class="card-box p-5">
+      <h1 class="text-xl font-semibold">水印</h1>
+      <div class="text-foreground/80 mt-2">
+        水印使用了
+        <a
+          class="text-primary"
+          href="https://zhensherlock.github.io/watermark-js-plus/"
+          target="_blank"
+        >
+          watermark-js-plus
+        </a>
+        开源插件，详细配置可见插件配置。
+      </div>
+    </div>
+
+    <div class="card-box mt-5 p-5">
+      <div class="mb-3 flex gap-3 text-lg font-semibold">
+        <Button type="primary" @click="createWaterMark()">创建水印</Button>
+        <Button danger @click="destroyWatermark">移除水印</Button>
+      </div>
+    </div>
+  </div>
+</template>