fix(preview): point the config-tree declaration at the plugin-bundled presets

The worker-preview pack landed on master declaring dsh.configTrees
against apps/cli/config/agent-presets, which this branch moved into
packages/preset/agent-presets/presets. The VFS mount and the worker-side
roster patch keep their paths; only the source directory follows the
move.

apps/cli/package.json

@@ -19,7 +19,7 @@
   ],
   "dsh": {
     "configTrees": [
-      { "mount": "config/agent-presets", "path": "config/agent-presets", "scanRoster": true }
+      { "mount": "config/agent-presets", "path": "../../packages/preset/agent-presets/presets", "scanRoster": true }
     ]
   },
   "license": "MIT",