feat(lang): def REGISTRY from "file.lres" - a game fills an open registry from its own file

The entries are read and checked against the registry's record as a
registry ... from file is, errors at the resource file's line, and they
are defs of the module that wrote the line: the registry must be open to
it, and they take that module's place in the stable order. Reseed.

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

examples/modules/crafting/index.ludic

@@ -0,0 +1,9 @@
+# crafting/index.ludic - a registry the game may add to, and the package's own first entry
+module crafting
+export property Recipe {
+  key: string = ""
+  name: string = ""
+  minutes: int = 0
+}
+export open registry Recipes of Recipe as RC
+def Recipes rope { name: "Rope", minutes: 10 }