Setup basic terminal output for Bun runtime

src/bun/terminal_io.ts

@@ -5,4 +5,10 @@ export async function* inputLoop() {
 	for await (const chunk of Bun.stdin.stream()) {
 		yield chunk;
 	}
-}
+}
+
+export async function write(s: string): Promise<void> {
+	const buffer = new TextEncoder().encode(s);
+
+	await Bun.write(Bun.stdout, buffer);
+}