v0.1.1 — Streaming Shiki code blocks

What's changed

• Render fenced code through Markstream MarkdownCodeBlockNode and stream-markdown.
• Add streaming Shiki highlighting for 34 common languages with visible plain-text fallback.
• Fix code blocks getting stuck as viewport skeletons inside the Harness chat scroller.
• Exclude the unused Monaco runtime from the single-file browser bundle.
• Keep Mermaid bundled and refresh the banner, screenshots, and bilingual documentation.

Verification

• TypeScript and 5 Vitest tests pass.
• Browser bundle and npm tarball build successfully.
• Verified in DeepSeek Harness Web with 10 visible Shiki blocks, no Monaco nodes, no stuck placeholders, and no browser warnings.