official support for uv

[dbrtly]

Is your feature request related to a problem? Please describe. I'd like direnv to layout python using astral-sh/uv in an elegant way.

Describe the solution you'd like

While this works, it breaks the prompt somehow. By default, without using direnv, uv uses the name of the base directory for the venv prompt.

realpath() {
    [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
}
layout_python-uv() {
    local python=${1:-python3}
    [[ $# -gt 0 ]] && shift
    unset PYTHONHOME
    if [[ -n $VIRTUAL_ENV ]]; then
        VIRTUAL_ENV=$(realpath "${VIRTUAL_ENV}")
    else
        local python_version
        python_version=$("$python" -c "import platform; print(platform.python_version())")
        if [[ -z $python_version ]]; then
            log_error "Could not detect Python version"
            return 1
        fi
        VIRTUAL_ENV=$PWD/.direnv/python-venv-$python_version
    fi
    export VIRTUAL_ENV
    if [[ ! -d $VIRTUAL_ENV ]]; then
        log_status "no venv found; creating $VIRTUAL_ENV"
        uv venv "$VIRTUAL_ENV" 
    fi

    PATH="${VIRTUAL_ENV}/bin:${PATH}"
    export PATH
    source "${VIRTUAL_ENV}/bin/activate"
}

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.