uckkk/dsh-bulgaria: Bulgaria Country Data Plugin

DSH (DeepSeek Harness) has released `uckkk/dsh-bulgaria`, a pure Node.js plugin for processing Bulgaria-specific data structures. The plugin has no network dependencies and runs entirely locally, and is marked as an ES Module. Installation requires the `@deepseek-ai/cordis` (^4.0.1) and `@deepseek-ai/dsh-tools` (>=0.1.0-rc.6) dependency requirements. It can be installed by running `dsh plugin add github:uckkk/dsh-bulgaria`. Developers should note that the plugin runs with the permissions of the current process, and should review its source code and license.