dsh-cloud-gateway: A Public Access and Login Wall Plugin for DeepSeek Harness

`dsh-cloud-gateway` is a public access plugin for DeepSeek Harness cloud deployments. It listens on port 8080 and reverse proxies requests to a local Harness instance, resolving the inability to access Harness directly from the public internet. The plugin provides a login wall, file reference features, and configuration flexibility. It supports changing account credentials and is compatible with reverse proxies such as Nginx. During installation, ensure that the startup command includes the `--trusted-host` parameter, and pair it with the `dsh-web-mobile` plugin for a better mobile experience.