Add migration

Author: enko

models/migrations/v1_23/v306.go

@@ -0,0 +1,13 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_23 //nolint
+
+import "xorm.io/xorm"
+
+func AddBlockAdminMergeOverrideBranchProtection(x *xorm.Engine) error {
+	type ProtectedBranch struct {
+		BlockAdminMergeOverride bool `xorm:"NOT NULL DEFAULT false"`
+	}
+	return x.Sync(new(ProtectedBranch))
+}