Move repository visibility to danger zone in the settings area (#31126)

Moved repository visibility to the danger zone in the settings area. To
change the visibility, it is necessary to go to the danger zone, click
on the private/public button, and accept the change in the modal.

Resolves:  #23826

---
## Screenshots

<details>
<summary>Before</summary>
Private repo:

![Private
repo](https://github.com/go-gitea/gitea/assets/65479069/4313492a-4854-48bc-9f47-974e3539d791)

Public repo:

![Public
repo](https://github.com/go-gitea/gitea/assets/65479069/1c45f6e4-ee93-4799-9331-e9d4a7e0f16a)

</details>
<details>
<summary>After</summary>
Make private:

![Screenshot from 2024-05-28
21-35-38](https://github.com/go-gitea/gitea/assets/65479069/4887e28a-0514-4990-aa69-bf3ddc7e6c7d)

Make private modal

![Screenshot from 2024-06-13
23-55-55](https://github.com/go-gitea/gitea/assets/65479069/9f5a7604-069b-41a2-973b-ee2d58e85953)

![Screenshot from 2024-06-13
23-53-09](https://github.com/go-gitea/gitea/assets/65479069/06c22726-eab2-4bce-8df7-62849dcce974)

Make public:

![Screenshot from 2024-05-28
21-34-27](https://github.com/go-gitea/gitea/assets/65479069/6d388f99-0356-48a0-9d85-320cdba55179)

Make public modal

![Screenshot from 2024-06-13
23-53-37](https://github.com/go-gitea/gitea/assets/65479069/8944972e-f2d4-4aea-ba96-b892febb5ced)

</details>

---------

Co-authored-by: Kemal Zebari <60799661+kemzeb@users.noreply.github.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/services/repository/repository.go b/services/repository/repository.go
index b7aac3cfe0..5306e7d45c 100644
--- a/services/repository/repository.go
+++ b/services/repository/repository.go
@@ -122,6 +122,31 @@ func UpdateRepository(ctx context.Context, repo *repo_model.Repository, visibili
 	return committer.Commit()
 }
 
+func UpdateRepositoryVisibility(ctx context.Context, repo *repo_model.Repository, isPrivate bool) (err error) {
+	ctx, committer, err := db.TxContext(ctx)
+	if err != nil {
+		return err
+	}
+
+	defer committer.Close()
+
+	repo.IsPrivate = isPrivate
+
+	if err = repo_module.UpdateRepository(ctx, repo, true); err != nil {
+		return fmt.Errorf("UpdateRepositoryVisibility: %w", err)
+	}
+
+	return committer.Commit()
+}
+
+func MakeRepoPublic(ctx context.Context, repo *repo_model.Repository) (err error) {
+	return UpdateRepositoryVisibility(ctx, repo, false)
+}
+
+func MakeRepoPrivate(ctx context.Context, repo *repo_model.Repository) (err error) {
+	return UpdateRepositoryVisibility(ctx, repo, true)
+}
+
 // LinkedRepository returns the linked repo if any
 func LinkedRepository(ctx context.Context, a *repo_model.Attachment) (*repo_model.Repository, unit.Type, error) {
 	if a.IssueID != 0 {