Merge WOMBATmid-2P2Z into main (issue #26) (#27)

* First commit of WOMBATmid - currently working but is carbon copy of WOMBATlite

* Microphytoplankton, their chlorophyll and their Fe content were added as tracers

* Added microphytoplankton and new parameter inputs and model ecosystem balancing

* Added variable Fe:C of zooplankton where their assimilation of Fe is decoupled from C, meaning that they excrete excess Fe when their biomass is enriched above the optimal Fe:C quota and they hold onto more (assimilate more) when their Fe:C quota is less than the optimal.

* Added mesozooplankton and Fe content of mesozooplankton. They are currently inert tracers.

* Mesozooplankton attributes added (input params) and changes made to default attributes of PFTs

* Parameters changed for PFTs

* Altered according to Dougie Squire's code review on the PR

---------

Co-authored-by: Pearse Buchanan <[email protected]>
Co-authored-by: Pearse Buchanan <[email protected]>
Co-authored-by: Pearse Buchanan <[email protected]>
Co-authored-by: Pearse Buchanan <[email protected]>

Author: 5 people