New SpectralGrid, Model, initialize!, simulation, run! structure

[milankl]

attempt to fix #320

@glwagner you might like this pull request!

[glwagner]

😂

I'm not 100% sure but the talk here might be relevant for some background:

https://docs.google.com/presentation/d/1eOZm1TOWQFrRSrNJ7KYmsJR_x1yXQCgr62txRAY3JSE/edit?usp=sharing

with some supporting information in

https://github.com/glwagner/ImprovingScientificSoftware2021-HumanCentricAbstractions

[navidcy]

I like where this PR is going!

(perhaps the PR title is a bit esoteric and not as descriptive tho...)

[glwagner]

Right, as much as it massages my ego...

[milankl]

@navidcy do you know why the documentation fails with

ERROR: LoadError: UndefVarError: @kwdef not defined

I probabaly removed all the Base. from Base.@kwdef we had before, but only the Documentation complains about this...

[navidcy]

@navidcy do you know why the documentation fails with

ERROR: LoadError: UndefVarError: @kwdef not defined

I probabaly removed all the Base. from Base.@kwdef we had before, but only the Documentation complains about this...

Was this the culprit or you still want me to have a look?

[milankl]

All solved now! Yeah, for some reason the documenter doesn't like @kwdef but requires Base.@kwdef, then I also realised that @with_kw has some features that @kwdef doesn't have (like you can do @assert within) but on the other hand @with_kw doesn't allow const declarations in mutable structs, so we have a mix of the two now 😆