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

vitest.config.ts

@@ -1,4 +1,5 @@
 import { defineConfig } from 'vitest/config'
+import path from 'path'
 
 export default defineConfig({
   test: {
@@ -11,5 +12,13 @@ export default defineConfig({
       provider: 'v8',
       reporter: ['text', 'json', 'html']
     }
+  },
+  resolve: {
+    alias: {
+      '@main': path.resolve(__dirname, './src/main'),
+      '@services': path.resolve(__dirname, './src/main/services'),
+      '@types': path.resolve(__dirname, './src/main/types'),
+      '@': path.resolve(__dirname, './src')
+    }
   }
 })