Add Storybook Implementation Controls Component

We need to add a Storybook entry for the Controls component.
https://github.com/diplodoc-platform/components/tree/master/src/components/Controls

This will facilitate easier testing, visualization, and documentation of the component for developers and designers.

Tasks:
- Create a new story file for the ToC component in the stories directory.
https://github.com/diplodoc-platform/components/tree/master/demo/src/Components
- Ensure the Storybook entry demonstrates the component’s basic functionality and key features.
- Implement story controls to allow interactive manipulation of component properties (e.g., different heading levels, styling options).
- Provide clear documentation within Storybook explaining how the component works, including examples of different use cases.

Acceptance Criteria:
- The ToC component appears in Storybook with a variety of examples and variations.
- Interactive controls are available and work as expected.
- Documentation within the Storybook is clear and helpful to users.

Start by comparing the Controls component in src/components/Controls with the existing stories under demo/src/Components, noting that the issue alternates between Controls and ToC. Add a Storybook story covering the component's examples, interactive properties, and explanatory documentation; done means it appears with working controls and clear variations.

Written by the indexing model from the issue text.