Add a .Type SymbolType enum

[thetarnav]

Add a .Type SymbolType enum

Not sure if Type is the best name for something in a SymbolType enum, But it's meant to be a generic variant for all types, besides the ones separately specified. Basically for all the maps, arrays, slices, dyn arrays, matrixes, etc To not have a symbol for each individual type, but a single one for all of them. Basically everything that wasn’t covered by existing enum, but is a type, not just any constant.

Also I cleaned up the visit_ident proc, to have a clear split between handling types and variables.

now all the types are consistently correct and all the constants consistently broken but fixing that requires more work (and deeper changes)

[DanielGavin]

I'll take a look at the constants when working on the new rename branch.