dsh-git-sync: Git Configuration Sync Center for DeepSeek Harness

`dsh-git-sync` is a Git configuration synchronization plugin for DeepSeek Harness, designed to address multi-machine configuration synchronization and unified management of multiple tools. It converts DSH configurations into a Git repository, supports adaptation for various AI tools such as OpenCode and Cline, and provides features including real-time/scheduled synchronization, conflict self-healing, and secure credential management. After users create a private repository on GitHub and configure local Git, the plugin enables automatic synchronization and version control of configurations across multiple devices.