DeepSeek Harness Plugin: 550C Boot Animation

`dsh-550c-boot` is a playful reskin plugin for DeepSeek Harness, intended to recreate the boot process of 550C devices. By injecting the first frame and playing a full-screen animation, it overrides the native loading screen and unifies the desktop button color scheme into four phosphorescent styles. The plugin offers two modes—simple (about 4 seconds) and full (about 16 seconds)—and supports skipping at any time. After installation, restart the client. Version requirement: DSH `>=0.2.0-rc.1`.