Add some blue cards

Starting to add monocolor cards

Added a few cards to try to get to 10 legends per color pair, 5 per color trio.

Replaced some card versions to use modern wording and crown borders if possible.

Added commander cards for:
-gruul
-selesnya
-orzhov
-izzet
-golgari
-boros
-simic

UW commanders + soulherder
UW themes:

• blink (yorion,oji,soulherder)
• Voltron (st traft, daxos, ojutai)
• instant/sorcery, combat tricks, attacking (taigam, daxos)
• flyers (inniaz, alela, kykar)
• artifacts & enchantments (tameshi, alela)

UB commanders
Themes:

• Zombies (Gisa and Geralf, Verina)

Adding the tricolor signpost commanders. Idea is 3-4 with tricolor casting cost and 1 that's more easily cast if possible.

May create custom versions of cards like Daghatar or Rigo if I need more easy-to-cast commanders.