Feature Request: Have gamepiece buttons disabled when it's not the player's turn

[tkshill]

Issue Context

Here we can see that the user can click a button even when it's the computer's turn to play. This should... not be so.

Suggested Solution

Behind the scenes, an active game exists in one of four turn states

type Player
    = Human
    | Computer

type alias Winner =
    Player

type Turn
    = ChoosingPiece
    | ChoosingCellToPlay ChosenPiece

type GameStatus
    = InPlay ActivePlayer Turn
    | Won Winner
    | Draw

Based on these types, the valid gamestatuses can be Inplay Human ChoosingPiece Inplay Computer ChoosingPiece Inplay Human ChoosingCellToPlay ChosenPiece Inplay Computer ChoosingCellToPlay ChosenPiece Won Winner Draw

Note that of these 6 options, the only time a game piece should be selectable is the first one, when a person is choosing a piece.

The view logic in Top.elm will have to be modified so the buttons are disabled except when the game is that specific turn state.

Alternatives Considered

Additional Resources

---

See here in the read me for how to run and install the application.

See here in contributing for the basics on forking and cloning the repository.

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[dominicduffin1]

I'd like to take this on!

[tkshill]

All yours my friend