move components/client to rt (runtime) directory

src/rt/shell/command/builtin/cd.ts

@@ -0,0 +1,13 @@
+import { set_working_dir, SetDirStatus } from "../../fs/fn"
+import type { Args, Term } from "../list"
+
+export default function cd(term: Term, args: Args): boolean {
+	const new_dir_status = set_working_dir(args[1])
+
+	if (new_dir_status === SetDirStatus.NotADirectory) {
+		// return <p>{"cd: \""}{bold(args[1])}{"\" is not a directory"}</p>
+	} else if (new_dir_status === SetDirStatus.NotFound) {
+		// return <p>{"cd: The directory \""}{bold(args[1])}{"\" does not exist"}</p>
+	}
+	return true
+}