chore: import Local-Cursor v1.1.8 source snapshot

Includes the current working directory changes. Historical commits and release binaries are excluded to limit Gitea storage.
Source base: d7515973fbfd6dd2001fa156c483455b8081c7cb

internal/backend/forwarder/process_exists_windows.go

@@ -0,0 +1,18 @@
+//go:build windows
+
+package forwarder
+
+import (
+	"errors"
+
+	"golang.org/x/sys/windows"
+)
+
+func processExists(pid int) bool {
+	handle, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION, false, uint32(pid))
+	if err == nil {
+		_ = windows.CloseHandle(handle)
+		return true
+	}
+	return errors.Is(err, windows.ERROR_ACCESS_DENIED)
+}