Centralized location for virtual environments

[callegar]

Apparently, uv wants the virtual environment for a project to reside inside a .venv directory in the project itself. Other tools (e.g., poetry, pdm) let one use a single location for all the virtual environments corresponding to many projects (e.g. ~/.local/share/pdm/venvs). While there are certainly situations where having everything related to a project self contained in there, in other cases a central location for virtual envs may have advantages (e.g. ease deduplication).

I wonder if this is supported or planned.

[chrisrodrigue]

Dupe of #1495 and #5229