Add topics for repository API (#31127)

Fix ##31100

Author: lunny

modules/structs/repo.go

@@ -113,6 +113,7 @@ type Repository struct {
 	// swagger:strfmt date-time
 	MirrorUpdated time.Time     `json:"mirror_updated,omitempty"`
 	RepoTransfer  *RepoTransfer `json:"repo_transfer"`
+	Topics        []string      `json:"topics"`
 }
 
 // CreateRepoOption options when creating repository

services/convert/repository.go

@@ -236,6 +236,7 @@ func innerToRepo(ctx context.Context, repo *repo_model.Repository, permissionInR
 		MirrorInterval:                mirrorInterval,
 		MirrorUpdated:                 mirrorUpdated,
 		RepoTransfer:                  transfer,
+		Topics:                        repo.Topics,
 		ObjectFormatName:              repo.ObjectFormatName,
 	}
 }