dsh-plugin-qiyao: A local-only seven-day calendar plugin

`nanrener/dsh-plugin-qiyao` is a DSH plugin that implements the Seven Luminaries calendar as a local command. Version 1.4.3, released under the MIT license, is zero-dependency, works offline, involves no predictions, and calculates no auspicious or inauspicious omens. Typing `/qiyao` in a session returns the current luminaries, planetary symbolism, and daily advice, with support for querying specific dates. The top bar plugin offers the same information as a floating tooltip. Additionally, users can organize their to-do lists by luminaries using the `Seven_Luminaries_Tasks.txt` file in the documentation directory. Installation requires visiting the DSH plugin page, entering the repository address, and restarting the client once for the button to take effect. The article also explains that the content is structured into three layers—historical calendar facts, planetary symbolism, and modern interpretations—and notes the importance of checking the source code and license during installation.