Migrate app to TypeScript (#1637)

* Initial setup and migrated src/common

* WIP

* WIP

* WIP

* Main module basically finished

* Renderer process migrated

* Added CI step and some fixes

* Fixed remainder of issues and added proper ESLint config

* Fixed a couple issues

* Progress!

* Some more fixes

* Fixed a test

* Fix build step

* PR feedback

src/types/config.ts

@@ -0,0 +1,81 @@
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+export type Team = {
+    name: string;
+    url: string;
+    order: number;
+}
+
+export type TeamWithIndex = Team & {index: number};
+
+export type Config = ConfigV2;
+
+export type ConfigV2 = {
+    version: 2;
+    teams: Team[];
+    showTrayIcon: boolean;
+    trayIconTheme: string;
+    minimizeToTray: boolean;
+    notifications: {
+        flashWindow: number;
+        bounceIcon: boolean;
+        bounceIconType: 'critical' | 'informational';
+    };
+    showUnreadBadge: boolean;
+    useSpellChecker: boolean;
+    enableHardwareAcceleration: boolean;
+    autostart: boolean;
+    spellCheckerLocale: string;
+    darkMode: boolean;
+    downloadLocation: string;
+}
+
+export type ConfigV1 = {
+    version: 1;
+    teams: Array<{
+        name: string;
+        url: string;
+    }>;
+    showTrayIcon: boolean;
+    trayIconTheme: string;
+    minimizeToTray: boolean;
+    notifications: {
+        flashWindow: number;
+        bounceIcon: boolean;
+        bounceIconType: 'critical' | 'informational';
+    };
+    showUnreadBadge: boolean;
+    useSpellChecker: boolean;
+    enableHardwareAcceleration: boolean;
+    autostart: boolean;
+    spellCheckerLocale: string;
+}
+
+export type ConfigV0 = {version: 0; url: string};
+
+export type AnyConfig = ConfigV2 | ConfigV1 | ConfigV0;
+
+export type BuildConfig = {
+    defaultTeams?: Team[];
+    helpLink: string;
+    enableServerManagement: boolean;
+    enableAutoUpdater: boolean;
+    managedResources: string[];
+}
+
+export type RegistryConfig = {
+    teams: Team[];
+    enableServerManagement: boolean;
+    enableAutoUpdater: boolean;
+}
+
+export type CombinedConfig = ConfigV2 & BuildConfig & {
+    registryTeams: Team[];
+    appName: string;
+}
+
+export type LocalConfiguration = Config & {
+    appName: string;
+    enableServerManagement: boolean;
+}