RE: Set-up mkdocs pages for known and RE'd data structures

Currently we are missing a good docs page for the known RE'd game data structures (VC08String, HashStringCaches, PointerArrays, FirstLastLinkedLists, DoublyLinkedLists, Nodes, etc)

A mkdocs page for the known and mapped ones would do wonders for readability (aside from having them in the idb file itself)