Add SEO skills 19-28, 31-32 with full Python implementations

12 new skills: Keyword Strategy, SERP Analysis, Position Tracking,
Link Building, Content Strategy, E-Commerce SEO, KPI Framework,
International SEO, AI Visibility, Knowledge Graph, Competitor Intel,
and Crawl Budget. ~20K lines of Python across 25 domain scripts.
Updated skill 11 pipeline table and repo CLAUDE.md.
Enhanced skill 18 local SEO workflow from jamie.clinic audit.

Note: Skill 26 hreflang_validator.py pending (content filter block).

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

custom-skills/31-seo-competitor-intel/desktop/tools/websearch.md

@@ -0,0 +1,28 @@
+# WebSearch
+
+> Web search tool documentation for competitor intelligence
+
+## Available Commands
+
+- `WebSearch` - Search the web for competitor information, market data, and Korean market presence
+
+## Configuration
+
+- No additional configuration required
+- Available as built-in Claude tool
+
+## Examples
+
+```
+# Check Naver Blog presence
+WebSearch(query="site:blog.naver.com competitor-domain.com")
+
+# Check Naver Cafe presence
+WebSearch(query="site:cafe.naver.com competitor-domain.com")
+
+# Research competitor market presence
+WebSearch(query="competitor-domain.com market share industry analysis")
+
+# Korean market competitor discovery
+WebSearch(query="경쟁사 분석 industry-keyword")
+```