fix(overriderules): enable override rules only when a service exists (#1417)

This PR disable the 'New Override Rule' button when no Radarr/Sonarr service exists.

src/components/Settings/SettingsServices.tsx

@@ -528,6 +528,7 @@ const SettingsServices = () => {
             <div className="flex h-full w-full items-center justify-center">
               <Button
                 buttonType="ghost"
+                disabled={!radarrData?.length || !sonarrData?.length}
                 onClick={() =>
                   setOverrideRuleModal({
                     open: true,