Support source generation for struct types

[Baka632]

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Is your feature request related to a problem? Please describe. I wish to serialize/deserialize struct types (including readonly struct) when NativeAOT enabled, but when I use my own StaticContext, it throws NotImplementedException.

I checked the output of YamlDotNet.Analyzers.StaticGenerator and found that no code was generated for my struct.

Describe the solution you'd like Modify source generator to support struct types.

Describe alternatives you've considered Convert my struct to class, but it's a breaking change.

Additional context I am using Vecc.YamlDotNet.Analyzers.StaticGenerator for source generation.