Add stockfish game analysis

[xeenoon]

Make a computer analysis system similar to the one on lichess. Analyze each position with stockfish, and measure the centipawn loss per move.

High lossage of centipawns will make moves be marked as being bad. Move levels will go like so:

• Brilliant (A move that would be terrible, at a depth lower than 10) Dark green
• Good (Any move that is somewhere around the engines recommended move,) Gray
• Inaccuracy (Playing a move that does not recognize a small advantage) Light blue
• Mistake (A bad move that makes your position worse) Orange
• Blunder (A move that loses material) Red

Should also provide the engine lines for 'missed wins', when you play a suboptimal move but a better variation is available.

Analysis should originally consist of just standard games, then crazyhouse (fairy-stockfish) and then DuckChess

[xeenoon]

This is currently being worked on in the StockfishIntegration branch