Map API for CommandHelper

CMDHELPER-2674 - Reported by ryan_the_leach

At current there is no way to manipulate maps with CommandHelper, whether it be simple stuff like changing zoom levels, scale and location, or the more complex task of editing the map itself, or creating overlays.

此 issue 未提供檔案、測試或進入點；請先找出 CommandHelper 現有的命令與地圖相關 API。釐清地圖操作、地圖編輯與建立覆蓋層之間的範圍，然後為支援的操作定義完成標準。

由索引模型根據 Issue 內容生成。