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*

services/convert/convert.go

@@ -158,6 +158,7 @@ func ToBranchProtection(ctx context.Context, bp *git_model.ProtectedBranch, repo
 	return &api.BranchProtection{
 		BranchName:                    branchName,
 		RuleName:                      bp.RuleName,
+		Priority:                      bp.Priority,
 		EnablePush:                    bp.CanPush,
 		EnablePushWhitelist:           bp.EnableWhitelist,
 		PushWhitelistUsernames:        pushWhitelistUsernames,

services/forms/repo_form.go

@@ -228,6 +228,10 @@ func (f *ProtectBranchForm) Validate(req *http.Request, errs binding.Errors) bin
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
+type ProtectBranchPriorityForm struct {
+	IDs []int64
+}
+
 //  __      __      ___.   .__                   __
 // /  \    /  \ ____\_ |__ |  |__   ____   ____ |  | __
 // \   \/\/   // __ \| __ \|  |  \ /  _ \ /  _ \|  |/ /