Add priority to protected branch (#32286)

## Solves

Currently for rules to re-order them you have to alter the creation
date. so you basicly have to delete and recreate them in the right
order. This is more than just inconvinient ...

## Solution

Add a new col for prioritization

## Demo WebUI Video

https://github.com/user-attachments/assets/92182a31-9705-4ac5-b6e3-9bb74108cbd1


---
*Sponsored by Kithara Software GmbH*

routers/web/web.go

@@ -1081,6 +1081,7 @@ func registerRoutes(m *web.Router) {
 			m.Combo("/edit").Get(repo_setting.SettingsProtectedBranch).
 				Post(web.Bind(forms.ProtectBranchForm{}), context.RepoMustNotBeArchived(), repo_setting.SettingsProtectedBranchPost)
 			m.Post("/{id}/delete", repo_setting.DeleteProtectedBranchRulePost)
+			m.Post("/priority", web.Bind(forms.ProtectBranchPriorityForm{}), context.RepoMustNotBeArchived(), repo_setting.UpdateBranchProtectionPriories)
 		})
 
 		m.Group("/tags", func() {