Port GroundObject model and endpoints from old repo

[21chanas3]

For AEAC, the GroundObject model should support "Sign of Fire" and "Fire Source" in Text for emergent objects

Ground Object

Name	Type	Required?	Description
ID	uuid	Yes	uuid of the object, for internal use
Type	ObjectType	Yes	Either standard or emergent
Latitude	float	Yes
Longitude	float	Yes
Shape	Shape	If Standard	Shape of the standard object
Color	Color	If Standard	Color of the standard object
Text	str	Yes	If standard, the text on the object. If emergent, a description of the object
TextColor	Color	If Standard	Color of the text

Shape

Circle, SemiCircle, QuarterCircle, Triangle, Rectangle, Pentagon, Star, Cross

Color

Black, Red, Blue, Green, Purple, Brown, Orange