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*

models/migrations/migrations.go

@@ -367,6 +367,7 @@ func prepareMigrationTasks() []*migration {
 		newMigration(307, "Fix milestone deadline_unix when there is no due date", v1_23.FixMilestoneNoDueDate),
 		newMigration(308, "Add index(user_id, is_deleted) for action table", v1_23.AddNewIndexForUserDashboard),
 		newMigration(309, "Improve Notification table indices", v1_23.ImproveNotificationTableIndices),
+		newMigration(310, "Add Priority to ProtectedBranch", v1_23.AddPriorityToProtectedBranch),
 	}
 	return preparedMigrations
 }