Implement timeout + insufficient material

When the time of a player runs out, that player losses the game. Except if the opponent has [insufficient material](https://support.chess.com/article/268-my-opponent-ran-out-of-time-why-was-it-a-draw).

No files or tests are named in the issue. Start by locating the engine's handling of player timeouts and game-ending conditions, then trace how insufficient material is detected. Done means an expired player's loss is recorded except when the opponent has insufficient material, in which case the result is a draw.

Written by the indexing model from the issue text.