feat(usersettings): add separate setting for streaming region (#993)

* feat: add separate setting for streaming region

Currently, the "Currently Streaming On" information is based on the Discover Region setting. This PR
adds a new setting to specify which region should be used to display the streaming region.

re #890

* fix: add missing newline

* fix: rename migration function

src/hooks/useUser.ts

@@ -29,7 +29,8 @@ type NotificationAgentTypes = Record<NotificationAgentKey, number>;
 
 export interface UserSettings {
   discordId?: string;
-  region?: string;
+  discoverRegion?: string;
+  streamingRegion?: string;
   originalLanguage?: string;
   locale?: string;
   notificationTypes: Partial<NotificationAgentTypes>;