chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

modules/session/key.go

@@ -0,0 +1,17 @@
+// Copyright 2025 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package session
+
+const (
+	KeyUID   = "uid"
+	KeyUname = "uname"
+
+	KeyUserHasTwoFactorAuth = "userHasTwoFactorAuth"
+
+	// KeySignInMethod records how the current session was authenticated so logout
+	// can decide whether RP-initiated OIDC logout is appropriate.
+	KeySignInMethod = "signInMethod"
+
+	SignInMethodOAuth2 = "oauth2"
+)