dsh-workspace-scope-selection: The Fourth Permission Option for DeepSeek Harness Sessions

The DeepSeek Harness plugin `dsh-workspace-scope-selection` provides a “Selected Workspace Write” option for session permissions, allowing users to precisely specify writable directories via a directory tree editor and balancing security with flexibility. The plugin enforces this restriction in filesystem and Shell tools and supports session persistence. Note that on Windows, only writes to the workspace and temporary areas are supported; out-of-scope write operations require approval escalation.