Function validate_formation_name 

pub fn validate_formation_name(name: &str) -> Result<String, &'static str>

Current Rules:

• 1-30 alphanumeric (only ASCII lowercase) characters or hyphen (0-9, a-z, A-Z, and ‘-’ )
• hyphens (‘-’) may not be repeated (i.e. ‘–’)
• no more than three (3) total hyphens
• no consecutive hyphens
• no trailing hyphen