Reverse a String

Write a function that takes a string and returns a new string with the characters in reverse order.

reverseString("hello")          // "olleh"
reverseString("Selamat pagi!")  // "!igap tamaleS"
reverseString("")               // ""
reverseString("Saya 🍜")        // "🍜 ayaS"

Constraints

• Always return a string (not an array).
• Spaces and punctuation are characters too — keep them.
• Single emoji like 🍜 or 👍 must come out unbroken. (Combined emoji such as family or flag emoji are out of scope.)
• The checker calls your function directly with several inputs. The live demo on the page is just for you.