WuV: decide where to put my MMT formalizations of WuV's syntax+semantics definitions

Months ago, I formalized the definitions of syntax, {deductive, computational, concretized} semantics and more at LATIN2@tetrapod: https://gl.mathhub.info/MMT/LATIN2/-/tree/tetrapod/source/type_theory/tetrapod

**Be cautious when merging into devel.** Dennis already did that and those files at devel. So I don't know what happens if we remerge.