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)

hooks/claude-codex-settings/scripts/webfetch_to_tavily_extract.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+"""
+PreToolUse hook: intercept WebFetch → suggest using tavily-extract instead
+"""
+import json
+import sys
+
+try:
+    data = json.load(sys.stdin)
+    url = data["tool_input"]["url"]
+except (KeyError, json.JSONDecodeError) as err:
+    print(f"hook-error: {err}", file=sys.stderr)
+    sys.exit(1)
+
+print(json.dumps({
+    "systemMessage": "WebFetch detected. AI is directed to use Tavily extract instead.",
+    "hookSpecificOutput": {
+        "hookEventName": "PreToolUse",
+        "permissionDecision": "deny",
+        "permissionDecisionReason": f"Please use mcp__tavily__tavily-extract with urls: ['{url}'] and extract_depth: 'advanced'"
+    }
+}, separators=(',', ':')))
+sys.exit(0)