Add existing to tracked

node_modules/@cesium/engine/Source/Shaders/SunFS.js

@@ -0,0 +1,11 @@
+//This file is automatically rebuilt by the Cesium build process.
+export default "uniform sampler2D u_texture;\n\
+\n\
+in vec2 v_textureCoordinates;\n\
+\n\
+void main()\n\
+{\n\
+    vec4 color = texture(u_texture, v_textureCoordinates);\n\
+    out_FragColor = czm_gammaCorrect(color);\n\
+}\n\
+";