refactor: 更新组件演示路径并添加新组件

- 更新数据库中组件演示路径，将 'demo' 替换为 'componentsDemo'- 添加多个新组件的 Vue 文件，包括：
  - CuteBusinessDemo
  - CuteDragTableDemo
  - CuteFileUploadDemo
  - CuteJavaEditorDemo
  - CuteMarkdownDemo
  - CuteOneKeyCopyDemo
  - CuteRichTextEditorDemo
  - CuteSimpleTableDemo
- 新组件涵盖了业务组件、表格组件、富文本编辑器、Markdown 编辑器等多种类型

cutejava-front/src/views/componentsDemo/CuteOneKeyCopyDemo.vue

@@ -0,0 +1,61 @@
+<template>
+  <div>
+    <el-divider>clipboard版</el-divider>
+    <span>{{ msg }}</span>
+    <div id="btn" @click="copy">复制</div>
+    <el-divider>OneKeyCopy组件版</el-divider>
+    <cute-one-key-copy style="margin-left: 10pt" :content.sync="msg" />
+  </div>
+</template>
+<script>
+import Clipboard from 'clipboard'
+import { Message } from 'element-ui'
+import CuteOneKeyCopy from '@/views/components/dev/CuteOneKeyCopy'
+export default {
+  components: { CuteOneKeyCopy },
+  data() {
+    return {
+      msg: '来复制我吧'
+    }
+  },
+  methods: {
+    // 复制方法
+    copy() {
+      const that = this
+      const clipboard = new Clipboard('#btn', {
+        text(trigger) {
+          console.log(trigger)
+          // 返回字符串
+          return that.msg
+        }
+      })
+      // 复制成功
+      clipboard.on('success', (e) => {
+        Message.success('复制成功')
+        console.log(e, '复制成功')
+        clipboard.destroy()
+      })
+      // //复制失败
+      clipboard.on('error', (e) => {
+        Message.error('复制失败')
+        console.log(e, '复制失败')
+        clipboard.destroy()
+      })
+    }
+  }
+}
+</script>
+<style scoped>
+#btn {
+  display: inline-block;
+  padding: 3px 12px;
+  border-radius: 6px;
+  background-color: #eee;
+  color: #333;
+  cursor: pointer;
+}
+#btn:active {
+  background-color: #ddd;
+  color: #666;
+}
+</style>