Setup logging transport in tests

Without a transport Winston will print annoying "Attempt to write logs
with no transports" warnings all over the place.  Setup a transport in
tests that cause logging to suppress this.

test/lib/ModStore.test.js

@@ -9,6 +9,7 @@ const nativeFetch = global.fetch;
 
 import { ModStore, ModInfo, ModVersionEquality } from "@clusterio/lib"; // Adjust path based on compiled output
 import { externalTest } from "../integration/index.js";
+import "../setup_logging.js";
 
 const MODS_DIR = path.join("temp", "test", "mod_store", "mods");
 const CACHE_FILE = path.join(MODS_DIR, "mod-info-cache.json");