36 create column

[pswu11]

Key changes:

• hook board with backend (via prisma)
• add initial default columns for users when no columns are found
• add backed functionality to create & delete column
• use zustand to maintain a local state for columns, because using the react query directly with dnd makes it very clunky and slow
• include choosing colors from the colorset for newly created columns

[pswu11]

@RealBirdMan91 Btw, I also moved DashboardHeader to the layout, instead of page. But it seems like there are some logic should be fixed to prevent two boards being rendered. :-)