Better automatic naming for generated dataclasses

[ozpau]

Currently, table named table_with_underscores would result in Table_With_Underscores.

Also, I would like to be able to name table users and get a class named User.

See this notebook/quarto page for a detailed example:

• https://github.com/ozpau/fastlite_improve_dataclass_automatic_name/blob/main/nbs/00_core.ipynb
• https://ozpau.github.io/fastlite_improve_dataclass_automatic_name/core.html