Capitalize Words

Write a function that takes a sentence as input and returns a new sentence where the first letter of each word is capitalized, and the rest of the letters are in lowercase.

Input: A string sentence containing one or more words separated by spaces.
Output: A new string where each word starts with an uppercase letter followed by lowercase letters.

Example Inputs & Outputs

// Example 1:
Input: "hello world"
Output: "Hello World"

// Example 2:
Input: "javaScript is FUN"
Output: "Javascript Is Fun"

// Example 3:
Input: "   multiple   spaces  "
Output: "Multiple Spaces"

// Example 4:
Input: ""
Output: ""

Constraints & Edge Cases

• Input may have multiple spaces between words.
• Input may contain uppercase, lowercase, or mixed-case characters.
• Input can be an empty string.
• Words can contain letters only; punctuation is not considered in this challenge.
• Leading/trailing spaces should be trimmed in the final result.