Add initial files

packages/preload/src/browser.ts

@@ -0,0 +1,21 @@
+import { ipcRenderer } from 'electron';
+
+const exit = () => {
+  ipcRenderer.send('window-close');
+};
+const maximize = () => {
+  ipcRenderer.send('window-maximize');
+};
+const minimize = () => {
+  ipcRenderer.send('window-minimize');
+};
+const unmaximize = () => {
+  ipcRenderer.send('window-unmaximize');
+};
+
+export const browser = {
+  minimize,
+  maximize,
+  unmaximize,
+  exit,
+};