add 6 skills to repo + update skill-review for xiaoming

- Add code-interpreter, kokoro-tts, remotion-best-practices,
  research-to-paper-slides, summarize, tavily-tool to source repo
- skill-review: add main/xiaoming agent mapping in handler.ts + SKILL.md
- tts-voice: handler.ts updates from agent workspace

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/tavily-tool/_meta.json

@@ -0,0 +1,6 @@
+{
+  "ownerId": "kn78x7kg14jggfbz385es5bdrn81ddgw",
+  "slug": "tavily-tool",
+  "version": "0.1.1",
+  "publishedAt": 1772290357545
+}