Function truncate

truncate(str: string, length: number): string
Truncates a string to a specified length.

This function takes a string and a maximum length as input and returns a truncated string. If the string is shorter than the specified length, it returns the original string.
Parameters
- str: string
  The string to truncate.
- length: number
  The maximum length of the truncated string.
Returns string
The truncated string.
Example
```
truncate("Hello, world!", 5); // "Hello..."
truncate("Hello, world!", 13); // "Hello, world!"
truncate("Hello, world!", 20); // "Hello, world!"
```
- Defined in utils/string/truncate.ts:15