Support generate --meta uv

[johnthagen]

uv is poised to become the most popular Python package manager, overtaking Poetry, PDM, etc.

It would be great to support generate --meta uv as an option. This should be very similar to pdm format given the similarity in using standard pyproject.toml fields.

[johnthagen]

The only PDM specific parts of --meta=pdm are:

[tool.pdm]
distribution = true

[build-system]
requires = ["pdm-backend"]
build-backend = "pdm.backend"

Also, uv does not really recommend upper bounding the Python version for libraries:

requires-python = ">=3.9,<4.0"

• https://docs.astral.sh/uv/pip/compatibility/#requires-python-enforcement