chore(vscode): prepare 0.8.9 marketplace release

Bumps the extension past the published 0.8.8 so the apis { } editor
tooling can ship: highlighting, api. completion and hover, the api=
attribute, the repositioned removed-block diagnostics, and the fix for
the spurious "Cannot find name 'api'" error.

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

editors/vscode/package.json

@@ -2,7 +2,7 @@
   "name": "wrnexus",
   "displayName": "WRNexus Language Support",
   "description": "Complete WRNexus v0.8.3 language support for typed imports, props, state, outputs, runtime functions, stores, diagnostics, formatting, navigation, and migration assistance.",
-  "version": "0.8.8",
+  "version": "0.8.9",
   "publisher": "wrnexus",
   "private": true,
   "license": "SEE LICENSE IN LICENSE",