Feature/zen mode (#110)

* Start with implementation
* Refactor AuthGuard, persist displayMode in user settings
* Refactor DisplayMode to ViewMode
* Update changelog

libs/common/src/lib/config.ts

@@ -1,4 +1,4 @@
-import { Currency } from '.prisma/client';
+import { Currency } from '@prisma/client';
 
 export const baseCurrency = Currency.CHF;
 

libs/common/src/lib/interfaces/user-settings.interface.ts

@@ -1,6 +1,7 @@
-import { Currency } from '@prisma/client';
+import { Currency, ViewMode } from '@prisma/client';
 
 export interface UserSettings {
   baseCurrency: Currency;
   locale: string;
+  viewMode: ViewMode;
 }