docs: Add a docs folder on building, the code's structure, the search and training

2026-11-09T10:32:43Z

Covers building and dependencies, the architecture and game loop, the board representation, the Player and MinimaxPlayer traits, the minimax search, the network and self-play training, benchmarking, and how to add a player. Co-Authored-By: Claude Opus 5.5

boss/tigers-and-sheep.git/docs/building.md, branch master

docs: Add a docs folder on building, the code's structure, the search and training