dsh-brunei: Brunei National Internet Tool

The `dsh-brunei` plugin in the DeepSeek Harness (DSH) ecosystem is maintained by uckkk and is designed to provide Brunei-related functionality for DSH agents. It is implemented in pure Node.js, does not rely on external network requests, and runs with the permissions of the current process. Before installation, ensure that the versions of `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools` are at least 4.0.1 and 0.1.0-rc.6, respectively. Users can install it by running the official command, and it is recommended to review the source code and license (MIT).