dsh-plugin-smooth-stream: Presenting DSH Streaming Output in Paragraph Batches

`dsh-plugin-smooth-stream` is a DSH client plugin maintained by SpookySandwich, designed to address issues in web sessions where streaming responses output word-by-word, causing page jitter and incomplete rendering of code blocks and tables. Without altering DSH's rendering capabilities, this plugin optimizes streaming output to display content in batches with a fade-in effect on a per-paragraph basis, while supporting smooth follow scrolling. When the user scrolls up, the plugin automatically yields control; during thinking phases, it displays a real-time single-line summary that automatically collapses at the end of the turn. The plugin retains native rendering features such as code highlighting, tables, and KaTeX formulas, and automatically degrades to plain text in case of errors. It offers eight entrance animations, adheres to the `prefers-reduced-motion` setting, and supports real-time preview and parameter adjustments (such as animation duration, split) in the settings panel.