dsh-weekday-name: DSH Plugin for Getting the Weekday Name

`dsh-weekday-name` is a DeepSeek Harness (DSH) plugin maintained by uckkk, offering a local way to retrieve the current day of the week name. Implemented in pure Node.js with no dependency on external networks, it can be invoked directly in a session after installation. It is suitable for scenarios that require local date calculations and aim to avoid network latency. Users should review the source code and license before use.