Remove IPlayer interface

Use PlayerObject instead when referring to the type of "The Player."

src/PersonObjects/Player/PlayerObjectWorkMethods.ts

@@ -1,20 +1,20 @@
 import { Work } from "../../Work/Work";
-import { IPlayer } from "../IPlayer";
+import { PlayerObject } from "./PlayerObject";
 
-export function start(this: IPlayer, w: Work): void {
+export function startWork(this: PlayerObject, w: Work): void {
   if (this.currentWork !== null) {
     this.currentWork.finish(true);
   }
   this.currentWork = w;
 }
-export function process(this: IPlayer, cycles = 1): void {
+export function processWork(this: PlayerObject, cycles = 1): void {
   if (this.currentWork === null) return;
   const finished = this.currentWork.process(cycles);
   if (finished) {
     this.finishWork(false);
   }
 }
-export function finish(this: IPlayer, cancelled: boolean): void {
+export function finishWork(this: PlayerObject, cancelled: boolean): void {
   if (this.currentWork === null) return;
   this.currentWork.finish(cancelled);
   this.currentWork = null;