Enhance Formats page

[locks]

On NRDB v2 we only have a list of the formats with an "unofficial" symbol. On NRDB proper we have Startup, Standard, and Eternal with a list to the current ban list, links to corp and runner decklists for different identities, as well as the legal cycles that are part of the format and card count.

The idea is to make this section a bit more interactive and allow users to explore the card base for each format.

[locks]

Writing up this issue a question popped into my mind. Is it what we want a card explorer? We have the decklist explorer, we can navigate through sets and cycles, we have the decklist builder with a sort of card explorer, and we have card search, but we don't really have a way to explore a certain card pool outside of deckbuilding.