Create association table between Game and Player

[robert-damoc]

Create a table named GamePlayer. It should be the association between the game and the player (i.e. many-to-many association table) Create a model for it.

Columns:

• id -> default id
• created_at -> default timestamp
• updated_at -> default timestamp
• position -> check this gem https://github.com/brendon/acts_as_list

Model:

• check this for associations reference: https://guides.rubyonrails.org/association_basics.html#choosing-between-has-many-through-and-has-and-belongs-to-many (we care about has_many :through)

Validations:

• ~a player can be part of only 1 active game at a time~

Seeds:

• Add some players to some games (i.e. create GamePlayer records for them)
  • make sure the position is set correctly