Update project setup scripts and enhance README for clarity

- Modified the backend setup script to clear the virtual environment before installation.
- Improved README.md by restructuring the prerequisites section into a table for better readability.
- Added installation instructions for the `uv` package and clarified terminal requirements post-installation.

backend/pyproject.toml

@@ -43,8 +43,8 @@ dev = [
 requires = ["hatchling"]
 build-backend = "hatchling.build"
 
-[tool.uv]
-dev-dependencies = [
+[dependency-groups]
+dev = [
     "pytest>=8.0.0",
     "pytest-asyncio>=0.23.0",
 ]