`params_species` (in both BiomeE example drivers) is needlessly filled up to 16 rows

[fabern]

params_species is needlessly filled up to 16 rows. This concerns both: biomee_gs_leuning_drivers and biomee_p_model_drivers

The reasons was that historically only 16-row data.frames were valid input into the Fortran code. This has been mitigated in the meantime.

• [ ] I suggest now, that params_species in both example drivers are reduced to the first four distinct rows. (Even though only the second vegetation type is then initialized as specified by biomee_p_model_drivers$init_cohort.)

library(rsofun)
library(dplyr)
library(tidyr)

# params_species <- rsofun::biomee_gs_leuning_drivers$params_species[[1]]
params_species <- rsofun::biomee_p_model_drivers$params_species[[1]]
params_species |> distinct()                                       #actually only 4 out of 16 rows are distinct
params_species |> distinct() |> select(where(~ n_distinct(.) > 1)) #showing the 4 properties where the 4 rows are distinct
params_species |> select(where(~ n_distinct(.) > 1))               #showing the 4 properties across all 16 rows
#                                                                  #the 4 properties are: phenotype, thetaBM, LMA, rho_wood

• [ ] Moreover, update of the documentation ?biomee_gs_leuning_drivers is needed. There only the following columns of init_cohort are documented: init_cohort_species, init_cohort_nindivs, init_cohort_bsw, init_cohort_bHW, init_cohort_nsc, thus missing are init_n_cohorts, init_cohort_bl, init_cohort_br, init_cohort_seedC