chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

modules/git/gitcmd/context.go

@@ -0,0 +1,32 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package gitcmd
+
+import (
+	"context"
+)
+
+type Context interface {
+	context.Context
+
+	// CancelPipeline is a helper function to cancel the command context (kill the command) with a specific error cause,
+	// it returns the same error for convenience to break the PipelineFunc easily
+	CancelPipeline(err error) error
+
+	// In the future, this interface will be extended to support stdio pipe readers/writers
+}
+
+type cmdContext struct {
+	context.Context
+	cmd *Command
+}
+
+func (c *cmdContext) CancelPipeline(err error) error {
+	// pipelineError is used to distinguish between:
+	// * context canceled by pipeline caller with/without error (normal cancellation)
+	// * context canceled by parent context (still context.Canceled error)
+	// * other causes
+	c.cmd.cmdCancel(pipelineError{err})
+	return err
+}