Parameter YAML Extraction from SchematicGraph

[abuzali-cqc]

No description provided.

[ad-cqc]

BTW, in my PR, I use YAML.jl as week dependency. It may worth to consider to move deserialization functionality to the corresponding package extension.

[gpeairs]

Hi Alex, thanks for getting this rolling! What would you think of coordinating with #204 so that extract_parameters can return a ParameterSet and delegate YAML I/O entirely to Art's extension? Are there any incompatible requirements between the two use cases?

[abuzali-cqc]

@gpeairs @ad-cqc I agree with Greg's point that it makes more sense to have the extraction return a ParameterSet and leave the YAML I/O entirely to to the ParameterSet methods, so I'll likely create a new PR building off of Art's branch. I agree we should use YAML.jl wherever possible, though we might need to add some extra functionality: as far as I can tell the package doesn't support writing anchors and references (only reading them), which is important for specifying component defaults.