Migrated first reducer to typescript, adding also type for the shared app state

src/utils/services/types.ts

@@ -0,0 +1,11 @@
+import { RegularServer } from '../../servers/data';
+import { GetState } from '../../container/types';
+import ShlinkApiClient from './ShlinkApiClient';
+
+// FIXME Move to ShlinkApiClientBuilder
+export type ShlinkApiClientBuilder = (getStateOrSelectedServer: RegularServer | GetState) => ShlinkApiClient;
+
+export interface ShlinkMercureInfo {
+  token: string;
+  mercureHubUrl: string;
+}