improve generated code for import

This improves the generated code for loading vector export and scalar export.

Expected but missing fields (previously didn't exist or were @exportoffd) no longer error immediately. It is up to the constructor of the e.g. Particle type (or importconstruct) to implement a sensible default.

In addition to that this change improves load time with 20k particles by x5-20 locally for me.

This should make some of the fix_import functions obsolete.

This breaks the matching done in add_scalar_fallback. This could now be done in importconstruct or alternatively adapt the matching. add_vector_fallback will also no longer match. An importconstruct would be easiest e.g. InPartS.ExportUtils.importconstruct(t::Type{<:MotileCell}; ∫Fax=NaN, kwargs...) = t(; ∫Fax, kwargs...)

Compat with all cell models and fix_import will need to be ensured.

src/export/generated.jl

@@ -351,9 +351,9 @@ module ExportUtils
     deserialize(::Any, @nospecialize(a::Type); kwargs...) = error("InPartS: no deserializer defined for type $a")
 
     """
-        deserializefromdict(dict, stype = Any; [sim::Simulation, mod::Module]) → Vector{T} where {T<:AbstractParticle}
-        deserializefromdict(dict, stype = Any; [mod::Module]) → T
-        deserializefromdict(notadict::T, ::Type{T},; [mod::Module]) where {T} = notadict
+        deserializefromdict(dict::AbstractDict, stype = Any; [sim::Simulation, mod::Module]) → Vector{T} where {T<:AbstractParticle}
+        deserializefromdict(dict::AbstractDict, stype = Any; [mod::Module]) → T
+        deserializefromdict(notadict, stype = Any; kwargs...) → notadict
 
     The reverse operation of [`serializetodict`](@ref). Deserializes the `dict` into either a vector or
     a single instance of the type T saved in `dict["$(STRUCTTYPE)"]`, depending on whether `T` has
@@ -370,10 +370,6 @@ module ExportUtils
     deserializefromdict(dict::AbstractDict, stype = Any; mod::Module = Main, kwargs...) = deserialize(dict, InPartS.reconstruct_subtype(dict[STRUCTTYPE], stype; mod); kwargs...)
     deserializefromdict(notadict, stype=Any; kwargs...) = notadict
 
-
-    """
-        collectvectors(vector::Vector{<:AbstractParticle}) → Dict{String, Any}
-
     # this is for save callbacks but I put it here because I don't want these words to be reserved in the main InPartS namespace
     @enum OnConflict fail skip compare overwrite