I need a clean, lightweight way to display country borders in my existing CesiumJS scene. The goal is a simple visualization: solid-line outlines that sit accurately on the globe with no tooltips or click actions—just clear, precise borders that render efficiently. You can work from a reliable GeoJSON or TopoJSON dataset, or fetch borders through an open-source tileset if that keeps the bundle smaller. Whichever source you choose, please handle the projection and height reference so the outlines hug the terrain correctly without z-fighting. Deliverables • A short, commented JavaScript module (ES6) that plugs into a standard Cesium viewer instance and loads the borders. • Styling set to solid lines, with an easily adjustable color and width parameter. • Any preprocessing script or steps you used to convert/optimize the border data. • Quick setup notes so I can drop the files into my project and see the borders immediately. I’m aiming for clarity and performance over bells and whistles, so keep dependencies minimal and the final footprint light.