Create a tool to introspect any serialization chunk

[dslmeinte]

The serialization format is a bit verbose, so introspecting it is not always so trivial. (The textualize CLI-functionality is quite helpful but can be severely improved on.)

It'd be good to have some sort of tool – probably Web-based – to introspect any LionWeb serialization chunk. That could mean:

• Nice JSON-based visualization, with collapsible areas.
• For languages: LionCore M3-specific visualization – possibly using lionweb-freon-m3.
  • Possibility to “unfold” inheritance.
  • Show constraint violations.
• Show either as tree or as list of nodes.
• Navigability: click on keys and IDs to navigate to their resolution (if available within the chunk, or the context).
• Validation: run @lionweb/validation on the chunk, and show the results (both separately and in-place?).
• Statistics: size of chunk, #nodes, classifiers instantiated, etc. – this is also part of Provide some statistics for serialization chunks (also as CLI) #120
• Show all instances of meta-pointers.