dsh-thrum: DeepSeek Harness Input Ambience Plugin

`dsh-thrum` is a playful theming plugin for DeepSeek Harness (DSH), designed to enhance the atmosphere of the input process. Through its core features—including a visual keyboard (keys flip to show random animals), mouse action highlighting, a flame particle effect while typing, input box vibration, and response feedback—it improves the tactile feel of interaction. Users can adjust parameters instantly in the DSH settings panel or the `cordis.patch.yml` configuration file. The installation command is `dsh plugin add github:lhf6623/dsh-thrum`; DSH version >= 0.2.0 is required. Note: if the system's "Reduce Motion" setting is enabled, the flame effect will be disabled automatically.