[New Feature] Allow Setting Harvesters to Area Guard Mission using Guard Keyboard Command

[Bittah]

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Description

; Allow Setting Harvesters to Area Guard Mission using Guard Keyboard Command

; Ordinary harvesters are unarmed and thus are not considered when executing
; the Guard Command. This hack adds exceptions for Harvester=yes and Weeder=yes.

; Author: AlexB
; Date: 2016-11-23

Proposed Code (optional)

No response

Additional Context

Implemented in ts-patches: https://github.com/CnCNet/ts-patches/blob/master/src/harvesters_guardcommand.asm