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)

skills/external/ccproxy-tools-setup/SKILL.md

@@ -0,0 +1,39 @@
+---
+name: setup
+description: This skill should be used when user encounters "ccproxy not found", "LiteLLM connection failed", "localhost:4000 refused", "OAuth failed", "proxy not running", or needs help configuring ccproxy/LiteLLM integration.
+---
+
+# ccproxy-tools Setup
+
+Run `/ccproxy-tools:setup` to configure ccproxy/LiteLLM.
+
+## Quick Fixes
+
+- **ccproxy/litellm not found** - Install with `uv tool install 'litellm[proxy]' 'ccproxy'`
+- **Connection refused localhost:4000** - Start proxy: `ccproxy start` or `litellm --config ~/.litellm/config.yaml`
+- **OAuth failed** - Re-run `ccproxy init` and authenticate via browser
+- **Invalid model name** - Check model names in `.claude/settings.json` match LiteLLM config
+- **Changes not applied** - Restart Claude Code after updating settings
+
+## Environment Variables
+
+Key settings in `.claude/settings.json` → `env`:
+
+| Variable                         | Purpose                                |
+| -------------------------------- | -------------------------------------- |
+| `ANTHROPIC_BASE_URL`             | Proxy endpoint (http://localhost:4000) |
+| `ANTHROPIC_AUTH_TOKEN`           | Auth token for proxy                   |
+| `ANTHROPIC_DEFAULT_OPUS_MODEL`   | Opus model name                        |
+| `ANTHROPIC_DEFAULT_SONNET_MODEL` | Sonnet model name                      |
+| `ANTHROPIC_DEFAULT_HAIKU_MODEL`  | Haiku model name                       |
+
+## Check Proxy Health
+
+```bash
+curl http://localhost:4000/health
+```
+
+## Resources
+
+- ccproxy: https://github.com/starbased-co/ccproxy
+- LiteLLM: https://docs.litellm.ai