fix(core-ui): stop excluding Storybook stories from typecheck

*.stories.tsx / *.stories.ts were excluded from tsconfig, so story
files never typechecked and could drift against component props
silently. Include them (they already typecheck cleanly); build is
tsc --noEmit so nothing new is emitted. The Select scrollIntoView port
from the downstream fork does not apply — this tree has no Select atom.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/core-ui/tsconfig.json

@@ -9,5 +9,5 @@
     }
   },
   "include": ["src/**/*"],
-  "exclude": ["node_modules", "dist", "**/*.stories.tsx", "**/*.stories.ts"]
+  "exclude": ["node_modules", "dist"]
 }