Improved token loading, removed card price code

[ctrlaltca]

Related Ticket(s)

• Fixes Loading from clipboard puts tokens in Maindeck #472
• Fixes Saving decks in text format puts tokens in main deck #1599

Short roundup of the initial problem

When loading a "plain text" deck from a file or clipboard, tokens were not recognized and added to the main deck

What will change with this Pull Request?

Tokens will be correctly added to the "tokens" deck zone.
Additionally, there were a lot of zone codes ("main", "side", "tokens") scattered around the code. They have been replaced by three new constants DECK_ZONE_*.

[ZeldaZach]

I pushed an additional change to this PR. It removes all traces of card pricing as we haven't used this feature for a long time and it's just scrap and this code was currently doing some stuff with it that was unneeded.

[ZeldaZach]

Changes work as expected, but someone else should confirm 1 more time to make sure the changes I put in work as well.

[ctrlaltca]

I don't get why you added unrelated changes to this PR, instead of creating a new one.

[ZeldaZach]

I saw you edited some parts of the code that dealt with pricing and I figured it was time to remove it, and I didn't want a merge conflict to arise. I can revert if you'd like and push your changes in and make a new PR later

[ctrlaltca]

Don't worry, that's fine
Let's wait for @Daenyth 's review and then merge

[ZeldaZach]

@Daenyth Can you get around to this at some point this weekend?

[Daenyth]

Squash the gcc commit manually but leave the "remove price" commit separate from "change token loading" commit please

[Daenyth]

indent

[ZeldaZach]

@Daenyth Done, good to go. I'll merge and not squash when it's ready or you can do it now.