fix: restore pyproject.toml for Python SDK v1.4.1

Author: RoyLin

sdk/python/pyproject.toml

@@ -0,0 +1,22 @@
+[build-system]
+requires = ["maturin>=1.0,<2.0"]
+build-backend = "maturin"
+
+[project]
+name = "a3s-code"
+version = "1.4.1"
+description = "A3S Code - Native Python bindings for the AI coding agent"
+readme = "README.md"
+license = {text = "MIT"}
+requires-python = ">=3.8"
+classifiers = [
+    "Programming Language :: Rust",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+]
+
+[tool.maturin]
+features = ["pyo3/extension-module"]
+module-name = "a3s_code"