Add uv as alternative installer for python packages

[KingMichaelPark]

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• Yes

Is your feature request related to a problem? Please describe.

Package resolution of python packages can be quite slow, especially for tools like sqlfluff.

Describe the solution you'd like

In the settings for python, add using uv as an alternative option, which will install packages using uv
instead of the native pip.

opts = { pip = { use_uv = true } } }

Describe potential alternatives you've considered

All other resolvers are about as fast as pip so this is the only alternative.

Additional context

No response

[effigies]

Conceived as an environment manager, which also happens to be an installer, I think #1841 is related. Consider something like:

opts = {
  python = {
    venv = "uv", -- "uv", "venv" or "virtualenv",
    installer = "uv", -- "uv" (default if venv == "uv") or "pip" (default if venv == "venv" or "virtualenv")
  }
}