main:添加核心文件并初始化项目

新增内容：
- 创建基础项目结构。
- 添加 `.gitignore` 和 `.dockerignore` 文件。
- 编写 `pyproject.toml` 和依赖文件。
- 添加算法模块及示例算法。
- 实现核心功能模块（日志、错误处理、指标）。
- 添加开发和运行所需的相关脚本文件及文档。

pyproject.toml

@@ -0,0 +1,50 @@
+[build-system]
+requires = ["setuptools>=65.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "functional-scaffold"
+version = "1.0.0"
+description = "算法工程化 Serverless 脚手架"
+requires-python = ">=3.9"
+authors = [
+    {name = "FunctionalScaffold Team"}
+]
+readme = "README.md"
+
+dependencies = [
+    "fastapi>=0.109.0",
+    "uvicorn[standard]>=0.27.0",
+    "pydantic>=2.5.0",
+    "pydantic-settings>=2.0.0",
+    "prometheus-client>=0.19.0",
+    "python-json-logger>=2.0.7",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=7.4.0",
+    "pytest-asyncio>=0.21.0",
+    "pytest-cov>=4.1.0",
+    "httpx>=0.26.0",
+    "black>=23.12.0",
+    "ruff>=0.1.0",
+]
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.black]
+line-length = 100
+target-version = ['py39']
+
+[tool.ruff]
+line-length = 100
+target-version = "py39"
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+python_files = ["test_*.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+addopts = "-v --strict-markers"