add stoke to text

Could you add a option to set the stroke of a text. This could be used as a glow effect or outline

The issue does not name a file, test, or entry point. Start by locating egui's text rendering and text-style APIs, then determine where a stroke option would fit. Done means text can render with a configurable stroke suitable for an outline or glow effect, with coverage for the new behavior.

Written by the indexing model from the issue text.