Setup wizard: plugin display names + GE-Enforce next-steps pointer

Plugins list now carries a displayname (manifest display_name, else the
machine name title-cased). Adds display_name to the four whose title-case
was wrong: GE-Enforce, USB, Measuring Tools, Knowledge Base. The setup
wizard Features step and Settings > Plugins render it, so "Geenforce"/"Usb"
are gone.

Finish step shows a pointer when GE-Enforce is enabled: it still needs a
scoped service token (Settings > API Tokens) and a share export root
(GE-Enforce page) before the fleet uses it - operational config the wizard
does not collect.

frontend build green; naming green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

plugins/geenforce/manifest.json

@@ -1,5 +1,6 @@
 {
   "name": "geenforce",
+  "display_name": "GE-Enforce",
   "version": "0.1.0",
   "description": "GE-Enforce manifest store. Owns imaging PC-type scopes and their install manifests (apps, scripts, files, registry, version gates) as shopdb data, served to the GE-Enforce client as JSON. Requires GE-Enforce lib >= 2.6 on target PCs (the _CmmVersion gate).",
   "author": "ShopDB Team",