feat: v0.13.0 Workbench multi-panel via panel v0.2.0

D.2-revisit closes the Workbench Gate-2 walkthrough: right-click
on Workbench now opens workbench_crafting (left-half layout-slot)
+ workbench_inv (right-half) simultaneously, replacing the v0.12.0
auto-switch workaround. Both panels visible at the same time.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

manifest.module

@@ -1,6 +1,6 @@
 {
     "id": "vagrant-skeleton",
-    "version": "0.12.0",
+    "version": "0.13.0",
     "kind": "module",
     "api": "^0.1",
     "ci_frames": 60,