Add support for configuring indent-width from user settings in VSCode

[xabru]

Description

Description:

Currently, the Ruff extension for VSCode allows users to configure the line length through the user settings, but there is no option to configure the indentation width (the number of spaces used for indentation). It would be highly beneficial to add an option for configuring the indent-width directly from the user settings in VSCode, providing more flexibility and consistency with the user's overall development environment settings.

Suggested Solution:

Add a configuration option in settings.json for ruff.indent-width, allowing users to set the desired number of spaces for indentation. This could work similarly to how the line-length option is already handled.