feat(viewer): add GM Ops Console window replacing ops strip

Introduces a floating, draggable, resizable Game Master console as the
first of a planned series of GM/debug windows. Replaces the horizontal
ops-strip card layout with proper data tables using TanStack Table v8.

- GmWindow.vue: reusable draggable+resizable floating window base;
  snapshots offsetWidth/Height on drag start so resize is preserved
- GmOpsWindow.vue: Ships / Stations / Factions tabs with global filter,
  column sorting, and drag-to-reorder columns (useColumnOrder composable)
- gmStore.ts: Pinia store fed from ViewerWorldLifecycle.rebuildFactions
  with raw world arrays (ships, stations, factions)
- Removes opsStripEl binding (was stored but never read by controller)
- GM Console toggle button replaces the bottom ops strip

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/viewer/package.json

@@ -9,6 +9,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@tanstack/vue-table": "^8.21.3",
     "pinia": "^3.0.3",
     "three": "^0.179.1",
     "vue": "^3.5.21"