Potion minigame (Improve My Game jam 23)

Added the minigame to brew Build-A-Gender potions:

 - Access the witch workshop with its inventory and cauldron

- 52 ingredients about different aspects of gender, to make your own combinations, complete with visual and descriptions

- Pick 5 ingredients to make a potion and get a recap of its effects

- The minigame appears only once in the story, but you can create as many potions as you want

- A skip button if you only want to read the story and don't care about the minigame

Coming soon: fulfil customer requests by brewing them a custom potion

Minor changes: Reduced the size of the character art files. Fixed a bug where an emoticon bubble pointed the wrong way around.