feat(python): add zeroclaw-tools companion package for LangGraph tool calling

- Add Python package with LangGraph-based agent for consistent tool calling
- Provides reliable tool execution for providers with inconsistent native support
- Includes tools: shell, file_read, file_write, web_search, http_request, memory
- Discord bot integration included
- CLI tool for quick interactions
- Works with any OpenAI-compatible provider (Z.AI, OpenRouter, Groq, etc.)

Why: Some LLM providers (e.g., GLM-5/Zhipu) have inconsistent tool calling behavior.
LangGraph's structured approach guarantees reliable tool execution across all providers.

python/zeroclaw_tools/__init__.py

@@ -0,0 +1,32 @@
+"""
+ZeroClaw Tools - LangGraph-based tool calling for consistent LLM agent execution.
+
+This package provides a reliable tool-calling layer for LLM providers that may have
+inconsistent native tool calling behavior. Built on LangGraph for guaranteed execution.
+"""
+
+from .agent import create_agent, ZeroclawAgent
+from .tools import (
+    shell,
+    file_read,
+    file_write,
+    web_search,
+    http_request,
+    memory_store,
+    memory_recall,
+)
+from .tools.base import tool
+
+__version__ = "0.1.0"
+__all__ = [
+    "create_agent",
+    "ZeroclawAgent",
+    "tool",
+    "shell",
+    "file_read",
+    "file_write",
+    "web_search",
+    "http_request",
+    "memory_store",
+    "memory_recall",
+]