Use package's structs and fix missing clone (#1172)

Closes #1169

Replaces structs that were added inline in hook structs with structs of
the corresponding SDKs. This makes it more readable and error-proof.

server/remote/coding/hook.go

@@ -142,6 +142,7 @@ func convertRepository(repo *Repository) (*model.Repo, error) {
 		Name:     repo.Name,
 		FullName: projectFullName(repo.Owner.GlobalKey, repo.Name),
 		Link:     repo.WebURL,
+		Clone:    repo.HTTPSURL,
 		SCMKind:  model.RepoGit,
 	}, nil
 }