Add flag usage description after declaring a Pokémon's name

[digitalghost-dev]

There is no customized -h or --help flag after a Pokémon's name is declared.
Example:
poke-cli pokemon lycanroc --help

Output:

 poke-cli pokemon <pokemon-name> [flags]                
                                                                                            
 FLAGS:                                                                              
     -a, --abilities      Prints out the Pokémon's abilities.
     -t, --types          Prints out the Pokémon's typing.