Validate configuration before starting game

[Zomis]

Allow rules to validate configuration.

Input: playerCount, GameConfigs
Output: List of rules, or list of strings that does not allow configuration

DSL Example:

val size = config("size") { 5 }
rule("test") {
    validateConfig { config.get(size) >= playerCount }
}

[Zomis]

Example use-cases:

• TTT, UTTT, Quixo, and all those kinds of games: m,n,k must be positive
• Avalon: If you use Percival, then you must also use Merlin and/or Morgana
• Liar's Dice: dice per player >= 1, exactly (or at most?) one of higher X any Y must be set
• Skull: skulls >= 1, flowers >= 1
• Splendor: maxMoney >= (min cost of starting cards), targetPoints >= 1
• Hanabi:
  • Max clue tokens >= 1
  • max fail tokens >= 1
  • if only one card each of rainbow then also rainbow
  • If rainbow is all colors then also rainbow
• Artax: x >= 4 and y >= 4
• UR: pieces per player >= 1