improve one-liner docstring

[Roger-luo]

While I don't like having an entire article in the docstring, some of our docstrings are too brief, and they are part of the hints - they only have one line. Let's keep a list of them to track progress.

• [ ] all methods in https://github.com/QuEraComputing/bloqade-python/blob/main/src/bloqade/builder/parse/trait.py (e.g add a small example)