Add theme browser page accessible from game options

Removed the themes buttons that were in the ThemeEditorModal and only
left a "Revert to Default" button along with a link to the ThemeBrowser
page.

Split off the buttons into reusable components since they are now used
in two pages.

Display the themes in big cards with a zoomable screenshot. Applying the
theme now shows a toast with an option to undo the action.

The snackbar now allows ReactNode instead of only strings.

- Add link with details on how to create a new theme in the game.
- Add link to the theme-sharing discord channel.
- Add icons to the theme & style buttons in GameOptions
- Add "Theme Editor" button to ThemeBrowser
- Add "Style Editor" button to ThemeBrowser
- Move Styles related files into Themes folder
- Includes a modal that shows a bigger version of the screenshot.
- Change Snackbar to allow for ReactNode as the message

src/Settings/Settings.ts

@@ -1,7 +1,7 @@
 import { ISelfInitializer, ISelfLoading } from "../types";
 import { OwnedAugmentationsOrderSetting, PurchaseAugmentationsOrderSetting } from "./SettingEnums";
 import { defaultTheme, ITheme } from "../Themes/Themes";
-import { defaultStyles } from "./Styles";
+import { defaultStyles } from "../Themes/Styles";
 import { WordWrapOptions } from "../ScriptEditor/ui/Options";
 import { OverviewSettings } from "../ui/React/Overview";
 import { IStyleSettings } from "../ScriptEditor/NetscriptDefinitions";

src/Settings/Styles.ts

@@ -1,6 +0,0 @@
-import { IStyleSettings } from "../ScriptEditor/NetscriptDefinitions";
-
-export const defaultStyles: IStyleSettings = {
-  lineHeight: 1.5,
-  fontFamily: "Lucida Console, Lucida Sans Unicode, Fira Mono, Consolas, Courier New, Courier, monospace, Times New Roman"
-}