Add comprehensive skills, agents, commands collection

- Added 44 external skills from obra/superpowers, ui-ux-pro-max-skill, claude-codex-settings
- Added 8 autonomous agents (commit-creator, pr-creator, pr-reviewer, etc.)
- Added 23 slash commands for Git/GitHub, setup, and plugin development
- Added hooks for code formatting, notifications, and validation
- Added MCP configurations for Azure, GCloud, Supabase, MongoDB, etc.
- Added awesome-openclaw-skills registry (3,002 skills referenced)
- Updated comprehensive README with full documentation

Sources:
- github.com/obra/superpowers (14 skills)
- github.com/nextlevelbuilder/ui-ux-pro-max-skill (1 skill)
- github.com/fcakyon/claude-codex-settings (29 skills, 8 agents, 23 commands)
- github.com/VoltAgent/awesome-openclaw-skills (registry)
- skills.sh (reference)
- buildwithclaude.com (reference)

commands/claude-codex-settings/claude-tools-load-frontend-skill.md

@@ -0,0 +1,13 @@
+---
+description: Load frontend design skill from Anthropic
+allowed-tools: WebFetch
+---
+
+# Load Frontend Design Skill
+
+Load the frontend-design skill from Anthropic's official Claude Code plugins to guide creation of distinctive, production-grade frontend interfaces.
+
+Fetch from:
+https://raw.githubusercontent.com/anthropics/claude-code/main/plugins/frontend-design/skills/frontend-design/SKILL.md
+
+Use this guidance when building web components, pages, or applications that require high design quality and avoid generic AI aesthetics.