Add minimum python version, typing-extensions dependency, and long description for PyPI

setup.py

@@ -1,11 +1,22 @@
 from skbuild import setup
 
+from pathlib import Path
+
+this_directory = Path(__file__).parent
+long_description = (this_directory / "README.md").read_text()
+
 setup(
     name="llama_cpp_python",
     description="A Python wrapper for llama.cpp",
+    long_description=long_description,
+    long_description_content_type="text/markdown",
     version="0.1.10",
     author="Andrei Betlen",
     author_email="abetlen@gmail.com",
     license="MIT",
     packages=["llama_cpp"],
+    install_requires=[
+        "typing-extensions>=4.5.0",
+    ],
+    python_requires=">=3.7",
 )