Parse XML doc on System.Linq.Expressions types and provide on visualizer

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Provide documentation in tooltip for:

• [ ] Property
• [ ] Node type
• [ ] Concrete object type, or narrowest public subtype (or interface?)

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https://docs.microsoft.com/en-us/dotnet/framework/unmanaged-api/metadata/imetadatadispenser-interface

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Or use https://www.mono-project.com/docs/tools+libraries/libraries/Mono.Cecil/ and store the XML doc in the assembly.