feat(lang): a module's private records and events are its own

A property or event a module does not export no longer collides with
another module's of the same spelling: each private one is renamed for
its module, with the types, new, emit and @On written in that module.
Exported ones stay one namespace; two events of one spelling are now
refused. Generic records, entity components and component or view
records stay global. Reseed.

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

examples/rejected/exported_kinds/a/index.ludic

@@ -0,0 +1,5 @@
+# a/index.ludic - exports Catch
+module a
+export property Catch {
+  fish: int = 0
+}