feat(lang): L9 resource files - registry ... from

registry NAME of RECORD [as PREFIX] from "file.lres" fills a registry from a data
file of key { field: value } entries, read at compile time with the record as its
schema: every entry is checked like a def, errors name the resource file's line,
nested records and lists of them are bare { } / [{ }] typed by their fields, and
values are expressions in the registry's module. The entries are compiled in, so
nothing parses at start-up and a build that succeeds has validated its resources.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

selfhost/frontend/registry_finish.ludic

@@ -50,6 +50,7 @@ function reg_fill(r: int) -> void {
         fi.a = ks
         push(rec.kids, fi)
       }
+      if comp != null { res_type_fields(rec, comp) }   # L9: nested records take their field's type
       let nw = node(E_NEW)
       nw.s = t
       nw.a = rec