ReverseWords

Write a function reverseWords that takes a sentence string as input and returns a new string where each word is reversed, but the order of the words remains the same.
Words are separated by spaces. Preserve the original spacing.

Example Inputs & Outputs

reverseWords("Hello World")           // → "olleH dlroW"  
reverseWords("JavaScript is fun")     // → "tpircSavaJ si nuf"  
reverseWords("  Lead  and Trail  ")   // → "  daeL  dna liarT  "  
reverseWords("")                      // → ""  
reverseWords("OneWord")               // → "droWenO"

Constraints & Edge Cases

• Input is always a string.
• Words are defined by space characters.
• Multiple spaces between words should be preserved.
• Leading/trailing spaces should also be preserved.
• Empty string input should return an empty string.