refactor: 改善剪贴板监听性能 修复大图卡顿与CPU高占用的问题

public/node_modules/clipboard-event/LICENSE

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+MIT License
+
+Copyright (c) 2020 Sudhakar R
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

public/node_modules/clipboard-event/index.js

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+const { EventEmitter } = require('events');
+const path = require('path');
+const { execFile } = require('child_process');
+
+class ClipboardEventListener extends EventEmitter {
+  constructor() {
+    super();
+    this.child = null;
+  }
+  startListening() {
+    const { platform } = process;
+    const file = `platform/clipboard-event-handler-${platform}${platform === 'win32' ? '.exe' : ''}`
+    if(platform !== 'win32' && platform !== 'darwin' && platform !== 'linux') {
+      throw new Error(`ClipboardEventListener is not supported on ${platform}`);
+    }
+    this.child = execFile(path.join(__dirname, file));
+    this.child.stdout.on('data', (data) => {
+      if (data.trim() === 'CLIPBOARD_CHANGE') {
+        this.emit('change');
+      }
+    });
+  }
+  stopListening() {
+    const res = this.child.kill();
+    return res;
+  }
+}
+
+module.exports = new ClipboardEventListener();