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/git/protected_branch_list.go

@@ -28,6 +28,13 @@ func (rules ProtectedBranchRules) sort() {
 	sort.Slice(rules, func(i, j int) bool {
 		rules[i].loadGlob()
 		rules[j].loadGlob()
+
+		// if priority differ, use that to sort
+		if rules[i].Priority != rules[j].Priority {
+			return rules[i].Priority < rules[j].Priority
+		}
+
+		// now we sort the old way
 		if rules[i].isPlainName != rules[j].isPlainName {
 			return rules[i].isPlainName // plain name comes first, so plain name means "less"
 		}