Feature: allow cycle objects to be set on rc

[cvanelteren]

Closes#200

With the improved Configurator instantiation, we can now more easily allow for cycle passing to enhance user experience to define default cycle colors. This PR introduces the ability for users to pass on lists of colors or Cycle objects directly.

[Copilot]

Pull Request Overview

This PR enables users to set cycle objects directly on the rc configuration, improving user experience for defining default cycle colors. Users can now pass color lists or Cycle objects in addition to string names.

Key Changes:

• Extended _validate_cmap function to handle Cycle objects and color lists when validating cycle configurations
• Added test coverage for different cycle input formats (string names, color lists, Cycle objects, and invalid inputs)

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
ultraplot/internals/rcsetup.py	Modified _validate_cmap to accept and validate Cycle objects and iterables when cycle=True parameter is set
ultraplot/tests/test_config.py	Added parameterized test to verify cycle setting behavior with various input types

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[codecov]

Codecov Report

❌ Patch coverage is 92.85714% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
ultraplot/internals/rcsetup.py	87.50%	0 Missing and 1 partial ⚠️

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