v2.0.1-v2.0.3

Minor bug fixes
Added Undo button to step back through and replay steps or fix a misclicked mapping
Included Solving-step clicks in the undo history as they're still board changing plays.
Comment cleanup

v2.0 Rework

This has been a whole v2.0 rework from both algorithm and design approach. Taking inspiration from the ever popular web page https://ham.io/watcher-solver/, this rework implements a "check-as-you-go" design that uses coroutines to no longer lock the game while solving. Tested with variable length statue control, not locked to 5 (the puzzle still uses exactly 5).

• Non-game-blocking via coroutines and smaller process chunks, better Breadth-first algorithm
• Streamlined UI/UX, directed approach - it tells you what to do without guessing
• Can solve the puzzle without having all of the statues mapped