Normalizes whitespace in a string. Trims leading and trailing whitespace and replaces sequences of internal whitespace characters (spaces, tabs, newlines) with a single space.
- Label: Source string
- Description: The input string whose whitespace will be normalized.
- Required: Yes
- Default: None
- Constraints: None
Returns a STRING containing the input with all whitespace normalized to single spaces and no leading or trailing whitespace.
Throws BotCommandException on invalid input or internal failure.
