dsh-follower-goal: Follower Growth Goal Breakdown Plugin

`uckkk/dsh-follower-goal` is a follower goal breakdown plugin dedicated to DeepSeek Harness (DSH). Implemented in pure Node.js with no network dependencies, it precisely calculates and returns detailed breakdown results based on the target follower count. Users can install it via the `dsh plugin add` command and invoke the tool directly within a session. It is suitable for workflow scenarios that require a quantified follower growth path.