chore: update Python version to 3.10 and bump package version to 0.1.3 in pyproject.toml and server.py; modify GitHub Actions workflow to use hatch for building (#29)

src/excel_mcp/__main__.py

@@ -1,6 +1,5 @@
 import asyncio
 import typer
-from typing import Optional
 
 from .server import run_sse, run_stdio