Enhancement: Indicate when token id is already minted

[rasmuscnielsen]

Ie by adding "Already minted - {TOKEN ID}" to the dropdown of personal tokens.

[rasmuscnielsen]

@briangershon As for this one my thoughts are

• Tweak the response of useAvatarContract@getAvailableTokens to somehow include mint status. Say an array of objects rather than current array of plain integers
• As a result the getAvailableTokens would - after fetching the inventory from server - also need to fetch the claim status of the individual tokens before return the response. I imagine the code would be quite similar to what the web server does for the genesis tokens only it might be another method to call on the avatar contract https://github.com/Developer-DAO/pixel-avatars/blob/29c44cbfacba4f63eea01b9d96b2d5bdb6567de7/web-server/src/repositories/GenesisRepository.js#L13-L18