feat: Phase 6 - Electron main process with native IPC handlers

- overlay:start/stop (MaqiangTangXiXiOverlay.exe)
- monitor:start/stop (MaqiangTangHardwareMonitor.exe)
- optimize:item/restore/list (MaqiangTangh1.exe)
- window controls, fs utilities

electron/vite.config.d.ts

@@ -0,0 +1,2 @@
+declare const _default: import("vite").UserConfig;
+export default _default;