DeepSeek Harness (DSH) Plugin: dsh-podman

`dsh-podman` is a core plugin for DeepSeek Harness (DSH) that provides a containerized, isolated execution environment via Podman by routing shell execution and file access to a container rather than the host. It supports ephemeral project containers, multi-image builds, privilege escalation, daemon execution, and terminal operations inside containers. The plugin is intended for agent development that requires environment isolation, is maintained by Exagone313, and is distributed under the MIT License.