Add unique arts for FIN tokens (Hero, Wizard, Bird)

[Prem-Sinha]

The Final Fantasy expansion introduced twelve new tokens, out of which three got multiple unique arts. Currently, these tokens only have one art each available on Cockatrice.

• 1/1 colorless Hero creature token
  This token has eight (8) unique arts.
• 0/1 black Wizard creature token with “Whenever you cast a noncreature spell, this token deals 1 damage to each opponent.”
  This token has two (2) unique arts.
• 2/2 green Bird creature token with “Whenever a land you control enters, this token gets +1/+0 until end of turn.”
  This token has two (2) unique arts.

This fork adds the remaining arts to the tokens.xml listing. The merge would bring these tokens in line with other tokens that have all of their unique arts available to see on the Printing Selector. This addition will be especially useful once a printing selector for tokens is implemented.

[ebbit1q]

you seem to have changed the indentation level for this and following lines, please restore the indentation to normal

[Prem-Sinha]

Thanks, I have restored the indentation to normal

[ebbit1q]

thanks for adding these!

for now we don't have a sorting in place for which of the repeat prints should be first, this might change with #350 but for now the fact that this pr does not have consistency on where they are added is fine!

[Prem-Sinha]

I did not change the order in which the tokens were listed in the file. When ordering the unique arts for each token, I simply went in order of their collector numbers.