dsh-czechia: Czechia

Under the DSH “everything is a plugin” philosophy, `dsh-czechia` is a pure Node.js module focused on Czechia-specific features, with no network dependencies and an MIT license. Users can install it from the command line using `dsh plugin add github:uckkk/dsh-czechia`. Before use, ensure the environment includes `@deepseek-ai/cordis` (^4.0.1) and `@deepseek-ai/dsh-tools` (>=0.1.0-rc.6). The plugin runs with the permissions of the current process; it is recommended to inspect the source code and license before installation.