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/bleve/bleve.go

@@ -170,7 +170,7 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 
 			if issueID, err := token.ParseIssueReference(); err == nil {
 				idQuery := inner_bleve.NumericEqualityQuery(issueID, "index")
-				idQuery.SetBoost(5.0)
+				idQuery.SetBoost(20.0)
 				innerQ.AddQuery(idQuery)
 			}
 
@@ -197,6 +197,15 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 		queries = append(queries, bleve.NewDisjunctionQuery(repoQueries...))
 	}
 
+	if options.PriorityRepoID.Has() {
+		eq := inner_bleve.NumericEqualityQuery(options.PriorityRepoID.Value(), "repo_id")
+		eq.SetBoost(10.0)
+		meh := bleve.NewMatchAllQuery()
+		meh.SetBoost(0)
+		should := bleve.NewDisjunctionQuery(eq, meh)
+		queries = append(queries, should)
+	}
+
 	if options.IsPull.Has() {
 		queries = append(queries, inner_bleve.BoolFieldQuery(options.IsPull.Value(), "is_pull"))
 	}