Update electron (major) (#1968)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

src/@types/electron-devtools-installer.d.ts

@@ -0,0 +1,18 @@
+/*
+Copyright 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
+Please see LICENSE files in the repository root for full details.
+*/
+
+// import "electron-devtools-installer";
+
+declare module "electron-devtools-installer" {
+    interface ExtensionReference {
+        id: string;
+        electron: string;
+    }
+
+    export const REACT_DEVELOPER_TOOLS: ExtensionReference;
+    export default function install(extension: ExtensionReference): Promise<string>;
+}

src/@types/global.d.ts

@@ -9,7 +9,7 @@ import { BrowserWindow } from "electron";
 import Store from "electron-store";
 import AutoLaunch from "auto-launch";
 
-import { AppLocalization } from "../language-helper";
+import { AppLocalization } from "../language-helper.js";
 
 // global type extensions need to use var for whatever reason
 /* eslint-disable no-var */