chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

modules/auth/common.go

@@ -0,0 +1,22 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package auth
+
+import (
+	"gitea.dev/modules/json"
+	"gitea.dev/modules/log"
+)
+
+func UnmarshalGroupTeamMapping(raw string) (map[string]map[string][]string, error) {
+	groupTeamMapping := make(map[string]map[string][]string)
+	if raw == "" {
+		return groupTeamMapping, nil
+	}
+	err := json.Unmarshal([]byte(raw), &groupTeamMapping)
+	if err != nil {
+		log.Error("Failed to unmarshal group team mapping: %v", err)
+		return nil, err
+	}
+	return groupTeamMapping, nil
+}