docs: Update README.md and CLAUDE.md for repo rename

- Renamed repository from claude-skills to our-claude-skills
- Updated README.md with current 23-skill inventory
- Updated skill numbering scheme in documentation
- Removed deprecated ga-agent-skills from structure
- Added AGENTS.md to key reference files
- Fixed GitHub URL references

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -4,7 +4,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 ## Repository Overview
 
-**GitHub**: https://github.com/ourdigital/claude-skills
+**GitHub**: https://github.com/ourdigital/our-claude-skills
 
 This is a Claude Skills collection repository containing:
 - **custom-skills/**: 23 custom skills for OurDigital workflows, SEO, GTM, and Jamie Brand
@@ -110,7 +110,7 @@ XX-skill-name/
 ## Directory Layout
 
 ```
-claude-skills/
+our-claude-skills/
 ├── custom-skills/
 │   ├── 00-claude-code-setting/
 │   │
@@ -160,4 +160,4 @@ python example-skills/skills-main/skill-creator/scripts/init_skill.py <skill-nam
 - `reference/SKILL-FORMAT-REQUIREMENTS.md` - Format specification
 - `example-skills/skills-main/skill-creator/SKILL.md` - Skill creation guide
 - `custom-skills/AUDIT_REPORT.md` - Skills completion status
-- `custom-skills/REFACTORING_PLAN.md` - Original refactoring plan
+- `AGENTS.md` - Agent routing guide for Task tool