Update make_grid.m. Save downgraded bathymetry, before filtering and smoothing, in GRD file to help bathymetry change evaluation.

Merge for croco_tools v2.0.0

See merge request !9

- Various bug fix
- Update to use the new copernicusmarine toolbox
- Update in Coupling tools

Improve Octave compatibility

See merge request !2

(cherry picked from commit 6af0fabf)

2db78511 Merge branch 'master' into release
a35d5c30 Add a CHANGELOG.md file
5f007487 Merge branch 'release' of gitlab.inria.fr:croco-ocean/croco_tools into release
a5de7e2f Merge branch 'master' into release
0a82b52f Nesting_tools : bugfix
0b2fcd2f Improve Octave compatibility

Some little cleaning in make_runoff.m.

problems in the create_crocoin.m for time stepping section

- bug fixes in the runoff positionning
- cleaning and cosmetics

Update Preprocessing_tools/Bio with Modification to create the initial
and boundary conditions for the Quota version of PISCES (Thanks to R.
Person)

For simplicity for tutorials

- Bug fix in ext_data_OGCM for data extraction (about crossing meridian)

Create_AGRIF_FixedGrids.in button. Thanks to S. Illig

homogenization of add_tidal_data with make_tides, especially for the case where the greenwhich meridian is crossed

- Small cleaning in routines (indentation)
- Add the capability to add the tidal forcing into the forcing files (eg
croco_frc_ECMWF_YxxxxMxx.nc)
- Add global attribute with :
     - the origin date (origin_date) used for the time of the oceanic forcing (ini, bry, clm files) and the atmospheric forcing (frc, blk)
     - the name of the product (product) used to create the oceanic frocing (SODA, ECCO, mercator, ...) or atmospheric forcing (CFSR, ERAI, ERA5, QSCAT, ...)

Miscellaneous:
-------------
- Add comments in Tides/make_tides_interannual.m
- Switch dl=1 to dl=2 in extr_tracers_ini.m to be consistent with ext_tracers.m
	modifié :         Aforc_CFSR/make_CFSR.m
	modifié :         Aforc_ECMWF/make_ECMWF.m
	modifié :         Aforc_ECMWF/make_ECMWF_daily.m
	modifié :         Aforc_ERA5/make_ERA5.m
	modifié :         Aforc_QuikSCAT/make_QSCAT_daily.m
	modifié :         Oforc_OGCM/make_OGCM.m
	modifié :         Oforc_OGCM/make_OGCM_mercator.m
	modifié :         Preprocessing_tools/ext_tracers_ini.m
	nouveau fichier : Preprocessing_tools/nc_add_globatt.m
	modifié :         Tides/make_tides_interannual.m

Again ... Still cleaning to put routines for preprocessing bgc (npzd,
bioebus, pisces) input files into a subdirectory Bio of Preprocessing_tools/

Still cleaning to put routines for preprocessing bgc (npzd, bioebus,
pisces) input files into a
subdirectory Bio of Preprocessing_tools/

- Add the possibility to create frc files with tides only
- Add a routine to create tide-only frc files for interanual simulation.
It can be useful for the plurimonths framework when using bulk +
tides for interanual run. It create a serie of tide-only
croco_frc_TIDETPXO_YxxxMxx.nc files with a varying start_date_mjd.

- put all the routines for processing climatological input
needed by biogeochemical models into Preprocessing_tools/Bio
- adapt start.m and oct_satrt.m accordingly

(cherry picked from commit c54f897d)