New mode: Puzzle

[hitch17]

Would be cool to have a mode that lets you play out magic puzzles. Could be useful for teaching someone how to play or just having a gauntlet of puzzles to play. I could see setting up a single player tournament that starts each round with a predefined (or randomized) puzzle situation. Win the match, and then you move onto the next puzzle until completion.

Here's an example of a puzzle: https://www.channelfireball.com/articles/puzzles-theyre-a-riot/

[JayDi85]

Puzzle format and/or import can be borrowed from another open source project Forge. Example puzzle format:

[metadata]
Name:Pauper Puzzles #16 - Near-Death Experience
URL:https://pauperpuzzles.wordpress.com/2017/03/04/16-near-death-experience/
Goal:Win
Turns:1
Difficulty:Hard
[state]
ActivePlayer=Human
ActivePhase=Main1
HumanLife=1
AILife=6
humanhand=Carrion Feeder;Faerie Macabre;Doom Blade;Rite of Consumption;Dark Dabbling
humanlibrary=Gurmag Angler
humanbattlefield=Swamp;Swamp;Swamp;Forest;Forest;Forest;Forest;Arrogant Wurm;Gorgon Recluse
aibattlefield=Stinkweed Imp|Id:16;Demonic Appetite|AttachedTo:16