[FEAT] Configure if protected branch rule should apply to admins

- Currently protected branch rules do not apply to admins, however in
some cases (like in the case of Forgejo project) you might also want to
apply these rules to admins to avoid accidental merges.
- Add new option to configure this on a per-rule basis.
- Adds integration tests.
- Resolves #65

models/forgejo_migrations/migrate.go

@@ -54,6 +54,8 @@ var migrations = []*Migration{
 	NewMigration("Add the `enable_repo_unit_hints` column to the `user` table", forgejo_v1_22.AddUserRepoUnitHintsSetting),
 	// v7 -> v8
 	NewMigration("Modify the `release`.`note` content to remove SSH signatures", forgejo_v1_22.RemoveSSHSignaturesFromReleaseNotes),
+	// v8 -> v9
+	NewMigration("Add the `apply_to_admins` column to the `protected_branch` table", forgejo_v1_22.AddApplyToAdminsSetting),
 }
 
 // GetCurrentDBVersion returns the current Forgejo database version.

models/forgejo_migrations/v1_22/v9.go

@@ -0,0 +1,15 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_22 //nolint
+
+import "xorm.io/xorm"
+
+func AddApplyToAdminsSetting(x *xorm.Engine) error {
+	type ProtectedBranch struct {
+		ID            int64 `xorm:"pk autoincr"`
+		ApplyToAdmins bool  `xorm:"NOT NULL DEFAULT false"`
+	}
+
+	return x.Sync(&ProtectedBranch{})
+}