feat: add overseerr version and update availability status to sidebar

sort of experimental so may be kinda broken. :)

server/interfaces/api/settingsInterfaces.ts

@@ -43,3 +43,10 @@ export interface CacheItem {
     vsize: number;
   };
 }
+
+export interface StatusResponse {
+  version: string;
+  commitTag: string;
+  updateAvailable: boolean;
+  commitsBehind: number;
+}