feat: overhaul application to APM 应用商店 with enhanced download management

- Removed CHANGELOG.md and electron-vite-vue.gif files.
- Updated LICENSE to reflect new copyright holder.
- Transformed README.md to reflect new project identity and features.
- Introduced DownloadQueue and DownloadDetail components for managing downloads.
- Implemented download simulation and management logic in App.vue.
- Added URL scheme handling in Electron main process.
- Integrated electron-app-universal-protocol-client for protocol handling.
- Updated package.json to include new dependencies.

electron/main/handle-url-scheme.ts

@@ -0,0 +1,5 @@
+import { dialog } from 'electron'
+
+export async function handleUrlScheme(requestUrl: string) {
+    console.log('Handling URL scheme request:', requestUrl);
+}

electron/main/index.ts

@@ -1,8 +1,15 @@
-import { app, BrowserWindow, shell, ipcMain } from 'electron'
+import { app, BrowserWindow, shell, ipcMain, dialog } from 'electron'
 import { createRequire } from 'node:module'
 import { fileURLToPath } from 'node:url'
 import path from 'node:path'
 import os from 'node:os'
+import { electronAppUniversalProtocolClient } from 'electron-app-universal-protocol-client'
+
+import { handleUrlScheme } from './handle-url-scheme.js'
+
+if (!app.requestSingleInstanceLock()) {
+  app.exit(0);
+}
 
 const require = createRequire(import.meta.url)
 const __dirname = path.dirname(fileURLToPath(import.meta.url))
@@ -76,6 +83,17 @@ async function createWindow() {
     return { action: 'deny' }
   })
   // win.webContents.on('will-navigate', (event, url) => { }) #344
+  
+  // Initialize universal protocol client
+  electronAppUniversalProtocolClient.on(
+    'request',
+    handleUrlScheme
+  );
+
+  await electronAppUniversalProtocolClient.initialize({
+    protocol: 'apmstore',
+    mode: 'development', // Make sure to use 'production' when script is executed in bundled app
+  });
 }
 
 app.whenReady().then(createWindow)