Fix the garbled Chinese characters in bash of DeepSeek Harness using dsh-bash-encoding

`dsh-bash-encoding` is a DSH host-side plugin (BSD-3-Clause) maintained by lhh010. It replaces `ctx.bash`, manages spawning and collecting raw bytes by itself, automatically recognizes encodings such as UTF-16LE, UTF-8 and GBK, and fixes Chinese garbled characters in bash under Windows + WSL. Installation: `dsh plugin add github:lhh010/dsh-bash-encoding`. Only one `ctx.bash` can exist in the same context; the default Windows native pwsh profile is deactivated.