Migrate root project from Poetry to uv/hatchling

- Convert pyproject.toml from Poetry to PEP 621 format
- Use hatchling as build backend
- Add dependency-groups for dev dependencies
- Fix trailing newlines in workflow templates

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

Author: nekeal

pyproject.toml

@@ -0,0 +1,29 @@
+[project]
+name = "cookiecutter-python-package"
+version = "0.1.0"
+description = "Cookiecutter template for Python packages"
+authors = [{name = "Szymon Cader", email = "szymon.sc.cader@gmail.com"}]
+readme = "README.md"
+requires-python = ">=3.11"
+dependencies = [
+    "cookiecutter>=2.2.3",
+    "pytest>=7.4.0",
+    "pyyaml>=6.0.1",
+    "toml>=0.10.2",
+]
+
+[dependency-groups]
+dev = [
+    "flake8-to-ruff>=0.0.233",
+    "black>=23.7.0",
+    "pre-commit>=3.3.3",
+    "python-redmine>=2.4.0",
+    "cffi>=1.17.1",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["."]