Function toTitleCase

toTitleCase(str: string, locale?: string): string
Converts a string to title case, where only the first letter of the entire string is capitalized. This is locale-aware if a locale is provided.
Parameters
- str: string
  The string to convert
- Optionallocale: string
  Optional locale for capitalization rules
Returns string
The title-cased string
Example
```
toTitleCase('HELLO WORLD'); // 'Hello world'
```
- Defined in packages/library/src/common/string.library.ts:63