Second slice of the re-architecture — the compiler now has ZERO type-
construction code beyond declare/define.
- instantiateTypeFunction: a type-fn body returning a computed Type (a call
to a non-generic, bodied, Type-returning fn) is comptime-evaluated with the
type bindings active, then renamed to the mangled instantiation name for
identity (renameNominalType). Replaces the old reify-call pattern-matching.
- DELETED: reifyType (lower/nominal.zig), findReturnReifyCall (lower/generic.zig),
and the stale inline-position reify gate in resolveTypeCallWithBindings.
- evalComptimeType (was evalComptimeTypeNamed): pure eval, no rename; the
type-fn caller renames explicitly. renameReifiedType → renameNominalType.
- The TYPE NAME now travels in the data: EnumInfo gains `name`, and define()
names the slot from it (the compiler derives no name from a binding LHS).
examples/0614/0615 carry `name = "..."`; RecvResult/TryResult set it too.
- field_type stays a reflection #builtin (reads a type); only construction
moved out. All reify mentions stripped from compiler source.
examples 0614/0615/0617 run on the floor. Full suite green (673).
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