Use GRS for the units

[VEZY]

The units for the coordinates are set to meters by default. When we write to the OPF files, we convert into centimeters (yes that's bad but it is what it is). Atm we x100 the values, but we should really transform into cm using the newly implemented CRS in Meshes. The code to update is here:

PlantGeom.jl/src/ops/read_ops.jl

Lines 81 to 84 in 0fbebac

	if row.pos !== Meshes.Point3(0.0, 0.0, 0.0)
	pos = Meshes.coordinates(row.pos) .* 100.0 # x100.0 because the scene is in m and the OPF in cm.
	scene_transformation = scene_transformation → Translate(pos...)
	end

Also in:

PlantGeom.jl/src/ops/read_ops.jl

Lines 107 to 108 in 0fbebac

	p_0 = scene_dimensions[1].coords .* 100 # m (scene) to cm (OPF)
	p_max = scene_dimensions[2].coords .* 100

What we should do also is to convert from m into cm when writing the OPF, and convert in m from cm when reading the OPF.

[VEZY]

Fixed in #69