Documentation added to PlantGeomPrimitives

Please double check if the added documentation meet the goals of the different types/functions.

Author: anaIFernst

Manifest.toml

@@ -4,6 +4,7 @@ authors = ["Alejandro Morales Sierra <alejandro.moralessierra@wur.nl> and contri
 version = "0.1.0"
 
 [deps]
+ColorTypes = "3da002f7-5984-5a60-b8a6-cbb66c0b333f"
 CoordinateTransformations = "150eb455-5306-5404-9cee-2592286d6298"
 FileIO = "5789e2e9-d7fb-5bc7-8068-2c6fae9b9549"
 GeometryBasics = "5c1252a2-5f33-56bf-86c9-59e7332b4326"
@@ -13,6 +14,7 @@ Rotations = "6038ab10-8711-5258-84ad-4b1120ba62dc"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 
 [compat]
+ColorTypes = "0.11.5"
 CoordinateTransformations = "0.6.3"
 FileIO = "1.16.1"
 GeometryBasics = "0.4.7"