IPVGO: Support scripts playing against each other as each color on "No AI" boards (#1917)

This is a big change with a *lot* of moving parts.

The largest part of it is enabling scripts to `playAsWhite` as a parameter to many Go functions. In the implementation, this involved a significant rewrite of `opponentNextTurn` promise handling.

A number of other changes and bugfixes are included:
* Fixes the issue where handicap stones are added on game load.
* Better typing for error callbacks.
* Throw errors instead of deadlocking on bad cheat usage.
* Return always-resolved gameOver promise after game end
* Added a new `resetStats` api function.

---------

Co-authored-by: David Walker <d0sboots@gmail.com>

test/jest/Go/boardState.test.ts

@@ -19,6 +19,7 @@ describe("Board analysis utility tests", () => {
       ai: GoOpponent.Illuminati,
       passCount: 0,
       cheatCount: 0,
+      cheatCountForWhite: 0,
     });
     expect(result.board?.length).toEqual(5);
   });