dsh-pet-teeth: Oral Health

`dsh-pet-teeth` is a DSH client plugin maintained by uckkk, focused on generating oral health and nutrition plans for pets. It is a pure Node.js implementation and does not require external network requests at runtime. Before using it, make sure the project depends on `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools`. It can be installed using the `dsh plugin add` command. After installation, users can directly call the registered `pet_teeth` tool in a DSH session. Because the plugin runs with the permissions of the current process, it is recommended to review the source code before use to ensure security.