DeepSeek Harness Plugin: dsh-wsl-native

`dsh-wsl-native` is a plugin for DeepSeek Harness that enables Windows and native Linux environments to coexist and interoperate within the same DSH window. By providing features such as process reuse, bidirectional execution, file transfer, and path conversion, it addresses the pain point of developers frequently switching between environments. The plugin supports Node.js development and cross-platform deployment, but note that the Linux side must use Linux Node, and community-maintained projects may exhibit differences in environment inheritance.