DedupeSort returns s with no duplicates and no empty strings, sorted.

Intersection return the intersection between one and two, sorted and dropping empty strings.

IsCamelCase returns false if s is empty or contains any character that is not between 'A' and 'Z', 'a' and 'z', '0' and '9', or in extraRunes.

IsCapitalized returns true if is not empty and the first letter is an uppercase character.

IsLowercase returns true if s is not empty and is all lowercase.

IsLowerSnakeCase returns true if s only contains lowercase letters, digits, and/or underscores.

IsUppercase returns true if s is not empty and is all uppercase.

IsUpperSnakeCase returns true if s only contains uppercase letters, digits, and/or underscores.

ToUpperCamelCase converts s to UpperCamelCase.

ToUpperSnakeCase converts s to UPPER_SNAKE_CASE.