feat(dashboard): UGC List view and References as sortable DataTables

The UGC page's List view (models and car/rocket assemblies) and an
assembly's References panel are server-side DataTables like the rest of
the dashboard: sort by clicking a column heading, in either direction,
with the page length and sort remembered per user. They still read
/api/ugc and /api/ugc/assembly/builds, so the prefix search and filters
above the list keep working; the gallery keeps its own pager and sort.

/api/ugc takes reverse=1 for a sort's other direction (the model list's
SQL order and the assembly sort both flip), and the references endpoint
sorts by id, owner, account or state. Tests cover the reversed orders.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dDatabase/GameDatabase/ITables/IUgcLookup.h

@@ -67,6 +67,7 @@ public:
 		UgcSearch search;
 		std::optional<IUgc::eProcessState> state;
 		eSort sort{ eSort::NEWEST };
+		bool reverse{}; // the sort's other direction (e.g. the fewest bricks first)
 		uint32_t offset{};
 		uint32_t limit{ 50 };
 	};