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/references/tavily-api.md

@@ -0,0 +1,55 @@
+# Tavily API notes (quick reference)
+
+## Endpoint
+
+- Search: `POST https://api.tavily.com/search`
+
+## Auth
+
+- Send the API key via HTTP header: `Authorization: Bearer <TAVILY_API_KEY>`.
+- This skill’s scripts read the key from **env var only**: `TAVILY_API_KEY`.
+
+## Common request fields
+
+```json
+{
+  "query": "...",
+  "max_results": 5,
+  "include_domains": ["example.com"],
+  "exclude_domains": ["spam.com"]
+}
+```
+
+(Additional Tavily options exist; this skill’s CLI supports only a common subset for discovery use-cases.)
+
+## Script usage
+
+### JSON output (stdout) + URL list (stderr)
+
+```bash
+export TAVILY_API_KEY="..."
+node skills/tavily/scripts/tavily_search.js --query "best open source vector database" --max_results 5
+```
+
+### URLs only
+
+```bash
+export TAVILY_API_KEY="..."
+node skills/tavily/scripts/tavily_search.js --query "SvelteKit tutorial" --urls-only
+```
+
+### Include / exclude domains
+
+```bash
+export TAVILY_API_KEY="..."
+node skills/tavily/scripts/tavily_search.js \
+  --query "websocket load testing" \
+  --include_domains k6.io,github.com \
+  --exclude_domains medium.com
+```
+
+## Notes
+
+- Exit code `2` indicates missing required args or missing `TAVILY_API_KEY`.
+- Exit code `3` indicates network/HTTP failure.
+- Exit code `4` indicates a non-JSON response.