feat: implement IPC handlers, database services and Extractor UI

- Add SqlServerService and MySqlService for database persistence
- Implement IPC handlers for file, extractor, cleaner, and database operations
- Define IPC API types and update preload script
- Create ExtractorPage UI with OrderNumberInput component
- Add unit and integration tests for MySQL and SQL Server
- Update vitest config with path aliases

src/main/index.ts

@@ -2,6 +2,7 @@ import { app, shell, BrowserWindow, ipcMain } from 'electron'
 import { join } from 'path'
 import { electronApp, optimizer, is } from '@electron-toolkit/utils'
 import icon from '../../resources/icon.png?asset'
+import { registerIpcHandlers } from './ipc'
 
 function createWindow(): void {
   // Create the browser window.
@@ -49,6 +50,9 @@ app.whenReady().then(() => {
     optimizer.watchWindowShortcuts(window)
   })
 
+  // Register IPC handlers
+  registerIpcHandlers()
+
   // IPC test
   ipcMain.on('ping', () => console.log('pong'))