feat: show more relevant results for 'dependencies' dropdown (#8003)

- Fix issue dropdown breaking when currently selected issue is included in results.
- Add `sort` parameter to `/issues/search` API.
- Sort dropdown by relevance.
- Make priority_repo_id work again.
- Added E2E test.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8003
Reviewed-by: Shiny Nematoda <snematoda@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: Danko Aleksejevs <danko@very.lv>
Co-committed-by: Danko Aleksejevs <danko@very.lv>

modules/indexer/issues/db/options.go

@@ -78,6 +78,11 @@ func ToDBOptions(ctx context.Context, options *internal.SearchOptions) (*issue_m
 		User:               nil,
 	}
 
+	if options.PriorityRepoID.Has() {
+		opts.SortType = "priorityrepo"
+		opts.PriorityRepoID = options.PriorityRepoID.Value()
+	}
+
 	if len(options.MilestoneIDs) == 1 && options.MilestoneIDs[0] == 0 {
 		opts.MilestoneIDs = []int64{db.NoConditionID}
 	} else {