ticket 1707 - add documentation validation to makeapi tool
    
    Iterate over all API commands and perform the following validation:
    
    * Every command must have documentation
      and it must be marked for international translation
    
    * Every module hosting a command must have documentation
      and it must be marked for international translation
    
    * Every module topic must be marked for international translation
    
    For every error found emit a diagnostic.
    Emit a summary of total errors found.
    
    Return error flag if errors found, zero otherwise.