Add Mention Text Styling Support in Message Information Section

Introduce dedicated styling support for mention text (e.g., @username) within the Message Information section of the UI Kit. Currently, mention names rendered in this view do not respect any customizable styling properties, making it difficult to maintain UI consistency with the main message list where mention styling is typically configurable. This limitation prevents developers from aligning colors, fonts, and emphasis for mentions across different parts of the application. Providing a property such as mentionTextStyle or a granular customization hook for mentions specifically within the Message Information component would ensure visual consistency, improve flexibility, and eliminate the need for complex custom overrides.