Implement capability generics, checked package specializations and CRUD scaffolding

Add kinded parameters, capability bounds, Self, aliases and closed application identities. Check generic implementations universally and build candidate-specific codecs and descriptors from immutable schemas. Preserve lexical aliases and exact dispatch identities in package and host bindings.

Add an imperative CRUD+index domain scaffold with explicit soft-deletion semantics, source/codegen regression coverage, installed CLI tests and an authoring guide. Existing Web Studio opaque props and class-level create-menu migration are separate from the implemented language core.

src/capability-language/assembly.ts

@@ -162,7 +162,10 @@ const environmentFor = (
     ),
   ),
   interfaceClosure: exactRevisions(
-    closure.flatMap((node) => (node.resource.kind === "interface" ? [node.resource.revision] : [])),
+    closure.flatMap((node) => [
+      ...(node.resource.kind === "interface" ? [node.resource.revision] : []),
+      ...(node.resource.specializations ?? []),
+    ]),
   ),
   packageClosure: exactRevisions(
     closure.flatMap((node) => (node.resource.kind === "package" ? [node.resource.revision] : [])),