Client REPL

1. In the cmd/client application, after declaring and binding the pause queue, use the NewGameState function in internal/gamelogic to create a new game state.
2. Add a REPL loop similar to what you did in the cmd/server application. Here's what each command should do:
   1. The spawn command allows a player to add a new unit to the map under their control. Use the gamestate.CommandSpawn method and pass in the "words" from the GetInput command.
      • Possible unit types are: infantry, cavalry, artillery
      • Possible locations are: americas, europe, africa, asia, antarctica, australia
      • Example usage: spawn europe infantry
      • After spawning a unit, you should see its ID printed to the console.
   2. The move command allows a player to move their units to a new location. It accepts two arguments: the destination, and the ID of the unit. Call the gamestate.CommandMove method and pass in all with "words" from the GetInput command. If the move is successful, print a message indicating that it worked.
      • Example usage: move europe 1
   3. The status command uses the gamestate.CommandStatus method to print the current status of the player's game state.
   4. The help command uses the gamelogic.PrintClientHelp function to print a list of available commands.
   5. For now, the spam command just prints a message that says "Spamming not allowed yet!"
   6. The quit command uses the gamelogic.PrintQuit function to print a message, then exit the REPL.
   7. If any other command is entered, print an error message and continue the loop.
3. Test the Client REPL
   1. Start up a client REPL and test each command.
   2. Make sure that you can spawn units of all the different types and move them around the map.

Once you're satisfied, move on to the next lesson.