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.

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

src/Netscript/RamCostGenerator.ts

@@ -270,6 +270,7 @@ const go = {
     getLiberties: 16,
     getControlledEmptyNodes: 16,
     getStats: 0,
+    resetStats: 0,
   },
   cheat: {
     getCheatSuccessChance: 1,