feat: migrate to uv package manager

- Add pyproject.toml with project configuration
- Update requirements.txt and requirements.dev.txt with versions
- Add .uv configuration file
- Update .gitignore for uv
- Update README with uv instructions
- Configure hatchling build system
- Add mypy configuration
- Test uv sync and pytest integration

requirements.dev.txt

@@ -1,8 +1,13 @@
-fakeredis
-pytest
-pytest-asyncio
-pytest-cov
-mypy
-ruff
-playwright
-python-dotenv
+# Testing dependencies
+fakeredis>=2.20.0
+pytest>=7.4.0
+pytest-asyncio>=0.21.0
+pytest-cov>=4.1.0
+playwright>=1.40.0
+
+# Code quality tools
+mypy>=1.7.0
+ruff>=0.1.0
+
+# Development utilities
+python-dotenv>=1.0.0