add readme for pypi package

Author: externref

README_PY.md

@@ -0,0 +1,29 @@
+# externkit
+
+A Python extension for external environment utilities built with Rust.
+
+## Features
+
+- Fast environment variable access
+- Cross-platform support
+- Built with Rust for performance
+
+## Installation
+
+```bash
+pip install externkit
+```
+
+## Usage
+
+```python
+import externkit
+
+# Get an environment variable
+value = externkit.env.get("HOME")
+print(value)
+```
+
+## License
+
+MIT License

pyproject.toml

@@ -5,8 +5,8 @@ build-backend = "maturin"
 [project]
 name = "externkit"
 version = "0.1.0"
-description = "A Python extension for externkit"
-readme = "README.md"
+description = "A Python extension for external environment utilities"
+readme = {file = "README_PY.md", content-type = "text/markdown"}
 license = {file = "LICENSE"}
 authors = [
     {name = "externref"},