Update project configuration and dependencies

- Added `.vscode` to `.gitignore` to exclude Visual Studio Code settings.
- Updated `pyproject.toml` to include `ruff` for linting and configured its settings.
- Modified `uv.lock` to include `ruff` in both optional and development dependencies.
- Refactored type hints in several files to use `str | None` for optional parameters.
- Cleaned up unused imports and whitespace in various modules for improved code clarity.

oxi/node.py

@@ -6,7 +6,6 @@ from oxi.exception import OxiAPIError
 
 from .view import NodeView
 
-
 if TYPE_CHECKING:
     from requests import Session