dsh-saving-goal: Precise Savings Goal Calculator

The DeepSeek Harness plugin `dsh-saving-goal` is a lightweight memory-based tool designed to help agents calculate savings goals locally. With no network dependencies and implemented in pure Node.js, it provides a `saving_goal` tool that accepts parameters and returns precise calculation results. Developers can quickly install it using a command to process financial data and create savings plans, making it well suited for integration into various agents.