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.

nix/checked-candidate.nix

@@ -70,7 +70,7 @@ let
             ${protocol}/bin/quixos-workspace-compile --root ${node.directory} \
               --source-root-commit ${pkgs.lib.escapeShellArg node.commit} \
               --checkout-root "$TMPDIR/checkouts" --snapshot-map ${snapshots} \
-              --graph-out "$out/graph.json" > "$out/candidate.json"
+              --graph-out "$out/graph.json" --schemas-out "$out/package-schemas.json" > "$out/candidate.json"
           ''
         else
           ''
@@ -95,7 +95,15 @@ let
         package.quixosPackages.${system}.checkedServer
           or (throw "Package ${node.repository} lacks checkedServer; use the supported package scaffold.");
       artifact = checked {
-        schema = "${compiled}/bindings.json";
+        schema =
+          if kind == "workspace" then
+            pkgs.writeText "package-specialization-schema.json" (
+              builtins.toJSON
+                (builtins.fromJSON (builtins.readFile "${contract}/package-schemas.json"))
+                .${candidate.revision.revisionId}
+            )
+          else
+            "${compiled}/bindings.json";
         generator = protocol;
         packageRevisionId = candidate.revision.revisionId;
       };