Add constructors API

[AlexisRenchon]

closes #1346

preview: https://clima.github.io/ClimaLand.jl/previews/PR1367/

Note: before merging, need to checkout docs/make.jl

Only the structs themselves show up in the API docs, not the constructor functions.
This commit fixes this issue.

[kmdeck]

thanks, Alexis! Im glad this is working.

We also have a number of model constructors which we should add. I referenced some here, but I am sure I missed some. I think we basically want any constructor for a parameter, or model, in the docs, especially the "convenience" ones that make it easy to setup models from forcing, domain, and the toml dict.

This includes integrated models too (land, soilcanopy, soil snow, soil biogeochemistry).

[AlexisRenchon]

thanks, Alexis! Im glad this is working.

We also have a number of model constructors which we should add. I referenced some here, but I am sure I missed some. I think we basically want any constructor for a parameter, or model, in the docs, especially the "convenience" ones that make it easy to setup models from forcing, domain, and the toml dict.

This includes integrated models too (land, soilcanopy, soil snow, soil biogeochemistry).

The integrated models have inner constructors, and the struct are in the API already, https://clima.github.io/ClimaLand.jl/stable/APIs/ClimaLand/ - I am not sure if we want to do something differently?

[kmdeck]

There are also some outer constructors for the integrated models:

ClimaLand.jl/src/integrated/land.jl

Line 122 in 6e43b5c

function LandModel{FT}(;

ClimaLand.jl/src/integrated/land.jl

Line 290 in 6e43b5c

function LandModel{FT}(

(for the LandModel - similar for soilcanopy)

[kmdeck]

I think this is everything but the canopy model constructors:

ClimaLand.jl/src/standalone/Vegetation/Canopy.jl

Line 517 in 6e43b5c

function CanopyModel{FT}(;

ClimaLand.jl/src/standalone/Vegetation/Canopy.jl

Line 601 in 6e43b5c

function CanopyModel{FT}(

and the couple of comments left below. thank you!

[juliasloan25]

this constructor is used in a few more places that need to be updated:

• ClimaLand.jl/src/standalone/Snow/Snow.jl

  Line 406 in 6e43b5c

  return SnowParameters{FT}(

• ClimaLand.jl/src/standalone/Snow/Snow.jl

  Line 492 in 6e43b5c

  parameters = SnowParameters{FT}(

• and a few tests