Homogenization 2.0

[marcadella]

• [x] Add in comments the units of the input and output for both functions (rh_to_vpd() and rad_to_ppfd() in generate_biomee_drivers.R)
• [x] Change inner_loop index name in biosphere_biomee.R.
• [x] Change QMD to QMD12
• [x] Add suffix to both params_type types
• [x] Remove unused parameters (outputhourly, outputdaily, dist_frequency, do_reset_veg)
• [x] Rename downscale -> aggregate and rate -> ratio
• [x] Remove 'THIS CREATES WEIRD BUG' comment
• [x] Move tests to test-model-runs.R
• [x] Replace 'validation data' to 'example output data' in the title for both: https://geco-bern.github.io/rsofun/reference/biomee_gs_leuning_output.html and https://geco-bern.github.io/rsofun/reference/biomee_p_model_output.html
• [x] Homogenize https://geco-bern.github.io/rsofun/reference/p_model_drivers_vcmax25.html and https://geco-bern.github.io/rsofun/reference/p_model_drivers.html
• [x] Extend https://geco-bern.github.io/rsofun/reference/biomee_validation.html at least with data description but preferably also with sources (apparently this is data from CH-LAE). So that eventually the docs are similar to https://geco-bern.github.io/rsofun/reference/p_model_validation_vcmax25.html and https://geco-bern.github.io/rsofun/reference/p_model_validation.html
• [x] Reorder the articles (https://geco-bern.github.io/rsofun/articles/) as below: P-model usage BiomeE usage Data format Parameter calibration and cost functions Sensitivity analysis and calibration interpretation
• [x] More explicit on https://geco-bern.github.io/rsofun/articles/data_format.html

[marcadella]

@stineb should I remove outputhourly, outputdaily, dist_frequency, do_reset_veg from the BiomeE parameters as they are never used anywhere?