zzstoatzz structured .cursorrules file for TypeScript

this is 2025. we use list not List, dict not Dict, | not Union or Optional

stylistically lower case everything, only uppercase when idiomatic

we use `uv` not `pip`
- `uv sync` to install dependencies (`--dev`, `--all-extras`, etc.)
- `uv run` is awesome! you can provide any bash, python, or even url of a python script to run
- `uvx` is an alias for `uv tool run`
- `uvx prefect server start` for example, installs prefect ephemerally and starts the server


its shadcn/ui not shadcn-ui