feat: 初始化PyFlowX轻量级DAG任务调度库

实现完整的DAG任务调度核心功能，包括：
1.  支持同步/异步/线程三种执行策略
2.  自动上下文注入，无需手动绑定任务依赖
3.  内置状态后端，支持断点续跑
4.  提供完整的测试用例与示例代码
5.  添加CI/CD配置与发布流程

pyproject.toml

@@ -1,7 +1,72 @@
 [project]
+authors = [{ name = "pyflowx" }]
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Topic :: Software Development :: Libraries :: Application Frameworks",
+]
+description = "Lightweight, type-safe DAG task scheduler with multi-strategy execution."
+keywords = ["async", "dag", "scheduler", "task", "workflow"]
+license = { text = "MIT" }
 name = "pyflowx"
-version = "0.1.0"
-description = "Add your description here"
 readme = "README.md"
 requires-python = ">=3.8"
-dependencies = []
+version = "0.1.0"
+# graphlib_backport only needed on Python 3.8 (stdlib graphlib exists in 3.9+)
+dependencies = ["graphlib_backport >= 1.0.0; python_version < '3.9'"]
+
+[project.optional-dependencies]
+dev = [
+    "hatch>=1.14.2",
+    "httpx>=0.28.0",
+    "mypy >= 1.0",
+    "prek>=0.4.5",
+    "pytest-asyncio>=0.24.0",
+    "pytest-cov>=5.0.0",
+    "pytest-html>=4.1.1",
+    "pytest-mock>=3.14.0",
+    "pytest-xdist>=3.6.1",
+    "pytest>=8.0.0",
+    "ruff>=0.8.0",
+    "tox-uv>=1.13.1",
+    "tox>=4.25.0",
+]
+
+[build-system]
+build-backend = "hatchling.build"
+requires      = ["hatchling"]
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/pyflowx"]
+
+[tool.hatch.build.targets.wheel.force-include]
+"src/pyflowx/py.typed" = "pyflowx/py.typed"
+
+[tool.mypy]
+# mypy 2.x requires a >=3.10 target. We check against 3.10 syntax; the
+# runtime stays 3.8-compatible via `from __future__ import annotations`
+# (all annotations are strings at runtime) and the graphlib_backport
+# conditional dependency for topological sorting.
+check_untyped_defs       = true
+disallow_incomplete_defs = true
+disallow_untyped_defs    = true
+files                    = ["src/pyflowx"]
+ignore_missing_imports   = false
+python_version           = "3.8"
+strict                   = true
+warn_return_any          = true
+warn_unused_configs      = true
+
+[tool.uv.sources]
+pyflowx = { workspace = true }
+
+[[tool.uv.index]]
+default = true
+url     = "https://mirrors.aliyun.com/pypi/simple/"
+
+[dependency-groups]
+dev = ["pyflowx[dev]"]