feat: enable color support in marimo notebooks

[banteg]

Type of changes

• Bug fix
• New feature
• Documentation / docstrings
• Tests
• Other

Checklist

• I've run the latest black with default args on new code.
• I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate.
• I've added tests for new code.
• I accept that @willmcgugan may be pedantic in the code review.

Description

I've added marimo notebook detection to the Rich console. The implementation includes:

1. A new _is_marimo() function that:

• Attempts to import the marimo module
• Checks if marimo.running_in_notebook() is True
• Handles both ImportError (if marimo isn't installed) and AttributeError (if the function doesn't exist)
• Returns False if any errors occur

2. Updated the _detect_color_system() method to:

• Check for marimo notebooks using the new function
• Set the color system to truecolor when running in a marimo notebook, just like with Jupyter

This implementation follows the same pattern as the existing Jupyter detection, ensuring consistent behavior across different notebook environments.