Add start with system option

src/main/autoStart.ts

@@ -0,0 +1,42 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0
+ * Vencord Desktop, a desktop app aiming to give you a snappier Discord Experience
+ * Copyright (c) 2023 Vendicated and Vencord contributors
+ */
+
+import { app } from "electron";
+import { existsSync, mkdirSync, rmSync, writeFileSync } from "fs";
+import { join } from "path";
+
+function makeAutoStartLinux() {
+    const dir = join(process.env.HOME!, ".config", "autostart");
+    const file = join(dir, "vencord.desktop");
+
+    return {
+        isEnabled: () => existsSync(file),
+        enable() {
+            const desktopFile = `
+[Desktop Entry]
+Type=Application
+Version=1.0
+Name=Vencord
+Comment=Vencord autostart script
+Exec=${process.execPath}
+Terminal=false
+StartupNotify=false
+`.trim();
+
+            mkdirSync(dir, { recursive: true });
+            writeFileSync(file, desktopFile);
+        },
+        disable: () => rmSync(file, { force: true })
+    };
+}
+
+const autoStartWindowsMac = {
+    isEnabled: () => app.getLoginItemSettings().openAtLogin,
+    enable: () => app.setLoginItemSettings({ openAtLogin: true }),
+    disable: () => app.setLoginItemSettings({ openAtLogin: false })
+};
+
+export const autoStart = process.platform === "linux" ? makeAutoStartLinux() : autoStartWindowsMac;