Improve build scripts, strip more fs-extras

bundle/src/start.ts

@@ -43,7 +43,7 @@ Commit Hash: ${
 				? `${cyan(commit)} (${yellow(commit.slice(0, 7))})`
 				: "Unknown (Git cannot be found)"
 		}
-Cores: ${cyan(cores)}
+Cores: ${cyan(os.cpus().length)} (Using ${cores} thread(s).)
 `)
 	);