hytime/dsh-thinking-effort: Supplementing the Thinking Intensity Settings for DSH's llm-pi-ai Model

`@hytime/dsh-thinking-effort` is a DSH plugin designed to supplement default configurations for third-party `llm-pi-ai` models that lack declared thinking effort levels. Its core functionalities include adding default levels of `off`, `high`, and `max` without overriding custom values; supporting the selection of thinking effort levels per model within DSH settings and mapping DSH levels to corresponding gateway values (e.g., `high` mapping to `ultra`); setting default thinking intensity for sub-agents, which only applies when not explicitly specified in a request; supporting multilingual interfaces in Chinese, English, Japanese, and Korean (with Japanese/Korean requiring DSH core support); and displaying a version watermark on the settings page. Users can manage the plugin via the DSH CLI command `dsh plugin --pr