uv add --editable requires the path as the positional argument, not a package name

Running uv add <package-name> --editable <path> fails with a misleading error: " did not resolve to a local directory, but the --editable flag was provided." uv treats the first positional argument as the package specifier; when --editable is present, that specifier must be the local path, not the PyPI name. This differs from pip's pattern where the package name is inferred from the path.

Use uv add --editable <path> without a separate package name argument when adding a local editable dependency.