dsh-wedding-budget: Wedding Budget Allocation Plugin

The DeepSeek Harness (DSH) plugin adopts the "everything is a plugin" philosophy, is maintained by uckkk, and provides wedding budget allocation. It supports precise calculations, requires no network dependencies, and is suitable for local offline use. Installation requires running the specified command and depends on `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools`. Please review the source code and MIT license before use.