dsh-asc: Native App Store Connect CLI Integration

`dsh-asc` is a plugin for DeepSeek Harness (DSH), maintained by Tangweiwei227. It integrates the App Store Connect CLI (`asc`) into agent workflows, enabling direct calls to 1,200+ API endpoints and 76 command groups. The plugin features structured invocations, JSON output, shell injection protection, and shared authentication, while destructive operations still require secondary confirmation. Installation requires the `asc` binary to be available locally, and it supports triggering operations such as listing apps, uploading builds, and fetching metadata directly through natural language.