feat: migrate Python SDK to httpx with async/await support (#26726)

Signed-off-by: lyzno1 <yuanyouhuilyz@gmail.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

sdks/python-client/setup.py

@@ -1,26 +0,0 @@
-from setuptools import setup
-
-with open("README.md", encoding="utf-8") as fh:
-    long_description = fh.read()
-
-setup(
-    name="dify-client",
-    version="0.1.12",
-    author="Dify",
-    author_email="hello@dify.ai",
-    description="A package for interacting with the Dify Service-API",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    url="https://github.com/langgenius/dify",
-    license="MIT",
-    packages=["dify_client"],
-    classifiers=[
-        "Programming Language :: Python :: 3",
-        "License :: OSI Approved :: MIT License",
-        "Operating System :: OS Independent",
-    ],
-    python_requires=">=3.6",
-    install_requires=["requests"],
-    keywords="dify nlp ai language-processing",
-    include_package_data=True,
-)