Ocean biogeochemistry component description

[jesusff]

I added an example of the ocean biogeochemistry component in the ENEA-REG3 model (even if it likely does not belong there):

model-documentation/_models/ENEA-REG3.md

Lines 203 to 218 in 2cc1366

	ocean_biogeochemistry:
	component: ocean_biogeochemistry
	name: BFM-OGSTM vX.Y
	family: BFM
	description: >
	The BFM-OGSTM coupled software is essentially a numerical solver for the
	transport reaction equations where the reaction terms are defined by the
	Biogeochemical Flux Model (BFM) framework.
	references:
	- citation: Lazzari and Bolzon (2023)
	doi: https://www.bfm-community.eu/files/bfm-ogstm-manual_r1.0_202306.pdf
	code_base: https://github.com/inogs/ogstm
	coupled_with:
	- ocean
	native_horizontal_grid:
	native_vertical_grid:

We'd need some experts to check this and also to see if we can introduce some additional specific features of this models, in order to understand their differences

@mcreal82 ?