v0.4

• GUI improvements

• New plugin: custom cards
  You can create custom decks from a list of image URLs or local paths, using the format
  <Count> <Image URL or path> (<Card name>). For example:

  1 https://example.com/cards/card1.png (Card Name 1)
  4 https://example.com/cards/card2.png (Card Name 2)
  2 C:\Users\User\Documents\Cards\card3.png (Card Name 3)
  1 C:\Users\User\Documents\Cards\card4.png (Card Name 4)