ufmt: Safe, Atomic Formatting with Black and µsort

ufmt (pronounced "micro-fmt") is a safe, atomic code formatter for Python, built on top of the popular `black` formatter and `µsort` import sorter. It combines their functionality into a single, atomic step, ensuring consistent code style and import order without intermediate conflicts. Currently at version 2.9.1, it requires Python 3.10 or newer and maintains an active release cadence.