[WIP] [[feature-stackarr]] Add text style enum typeinfo and related functions.

Add the ability to obtain a set of enum values representing a text style.
libfoundation: __MCTypeInfoResolve(): Sanity check for unbound named types.

Add a sanity check assertion to catch any attempt to resolve named
type infos that haven't been bound to a concrete type info
(i.e. programmer error).
Merge pull request #1567 from peter-b/develop

libfoundation: __MCTypeInfoResolve(): Sanity check for unbound named types
Merge branch 'develop' into feature-stackarr.