Support actions and reusable workflows from private repos (#32562)

Resolve https://gitea.com/gitea/act_runner/issues/102

This PR allows administrators of a private repository to specify some
collaborative owners. The repositories of collaborative owners will be
allowed to access this repository's actions and workflows.

Settings for private repos:


![image](https://github.com/user-attachments/assets/e591c877-f94d-48fb-82f3-3b051f21557e)

---

This PR also moves "Enable Actions" setting to `Actions > General` page

<img width="960" alt="image"
src="https://github.com/user-attachments/assets/49337ec2-afb1-4a67-8516-5c9ef0ce05d4"
/>

<img width="960" alt="image"
src="https://github.com/user-attachments/assets/f58ee6d5-17f9-4180-8760-a78e859f1c37"
/>

---------

Signed-off-by: Zettat123 <zettat123@gmail.com>
Co-authored-by: ChristopherHX <christopher.homberger@web.de>

routers/web/web.go

@@ -1159,11 +1159,21 @@ func registerWebRoutes(m *web.Router) {
 				m.Post("/{lid}/unlock", repo_setting.LFSUnlock)
 			})
 		})
+		m.Group("/actions/general", func() {
+			m.Get("", repo_setting.ActionsGeneralSettings)
+			m.Post("/actions_unit", repo_setting.ActionsUnitPost)
+		})
 		m.Group("/actions", func() {
 			m.Get("", shared_actions.RedirectToDefaultSetting)
 			addSettingsRunnersRoutes()
 			addSettingsSecretsRoutes()
 			addSettingsVariablesRoutes()
+			m.Group("/general", func() {
+				m.Group("/collaborative_owner", func() {
+					m.Post("/add", repo_setting.AddCollaborativeOwner)
+					m.Post("/delete", repo_setting.DeleteCollaborativeOwner)
+				})
+			})
 		}, actions.MustEnableActions)
 		// the follow handler must be under "settings", otherwise this incomplete repo can't be accessed
 		m.Group("/migrate", func() {