[TODO] Extract BlockState parsing into virion

[inxomnyaa]

Description:
Currently libstructure still depends on MagicWE2. This should be changed to allow use of the library in other projects.

This would also ease maintainability in MWE2 & the BlockState parsing.

The repo is currently already present here, but without any of the PM code.

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TODO list:

• Create virion
• Use virion in MagicWE2
• Make libstructure depend on this virion (if possible)
• Rewrite some of the stuff

[inxomnyaa]

libblockstate is mostly finalized