chore(release): prepare 0.8.5

Bumps every @wrnexus package 0.8.4 -> 0.8.5 and adds the matching update
migration. The migration is documentation only: moving off <Table> to
<DataTable> and off the @wrnexus/ui main entry to @wrnexus/ui/registry are
source changes no codemod can make safely.

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

packages/core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@wrnexus/core",
-  "version": "0.8.4",
+  "version": "0.8.5",
   "type": "module",
   "main": "src/index.ts",
   "exports": {