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_test.go

@@ -75,7 +75,7 @@ func TestBranchRuleMatchPriority(t *testing.T) {
 	}
 }
 
-func TestBranchRuleSort(t *testing.T) {
+func TestBranchRuleSortLegacy(t *testing.T) {
 	in := []*ProtectedBranch{{
 		RuleName:    "b",
 		CreatedUnix: 1,
@@ -103,3 +103,37 @@ func TestBranchRuleSort(t *testing.T) {
 	}
 	assert.Equal(t, expect, got)
 }
+
+func TestBranchRuleSortPriority(t *testing.T) {
+	in := []*ProtectedBranch{{
+		RuleName:    "b",
+		CreatedUnix: 1,
+		Priority:    4,
+	}, {
+		RuleName:    "b/*",
+		CreatedUnix: 3,
+		Priority:    2,
+	}, {
+		RuleName:    "a/*",
+		CreatedUnix: 2,
+		Priority:    1,
+	}, {
+		RuleName:    "c",
+		CreatedUnix: 0,
+		Priority:    0,
+	}, {
+		RuleName:    "a",
+		CreatedUnix: 4,
+		Priority:    3,
+	}}
+	expect := []string{"c", "a/*", "b/*", "a", "b"}
+
+	pbr := ProtectedBranchRules(in)
+	pbr.sort()
+
+	var got []string
+	for i := range pbr {
+		got = append(got, pbr[i].RuleName)
+	}
+	assert.Equal(t, expect, got)
+}