Setup basic terminal output for Bun runtime

src/bun/terminal_io.ts

@@ -6,3 +6,9 @@ export async function* inputLoop() {
 		yield chunk;
 	}
 }
+
+export async function write(s: string): Promise<void> {
+	const buffer = new TextEncoder().encode(s);
+
+	await Bun.write(Bun.stdout, buffer);
+}