Finish GUI functionality for Spell Stone

[Fi0x]

Change the way the spell stone works.

Implement GUI

Add a GUI that accepts items, has buttons and displays added spell parts

• Buttons
  • [x] Add spell part from provided items
  • [x] Clear list of added spell parts and drop stored items
  • [x] Transfer spell parts into spell
• Item Slots
  • [x] Spell input
  • [x] Spell output
  • [x] 5 items to create spell parts
• Added Part display
  • [x] Scrollable
  • [x] Icons with tooltip OR text

Add new verification method for items

Check if spell part items result in an actual spell part when the "Add" button is pressed

• Add a helper class
  • [x] Provide a list that contains sets of items that result in a spell part
  • [x] Iterate the list and return a spell part if it is contained in the list
  • [x] Return no spell part if the items don't match any

Add structure requirement around spell stone

Just to make it look cool

• [x] Create a cool shape for the structure
• Deny spell creation if structure is not valid
  • [x] Deny GUI opening if structure is invalid OR deny spell part adding OR deny spell creation