Add existing to tracked

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

@@ -0,0 +1,11 @@
+//This file is automatically rebuilt by the Cesium build process.
+export default "in vec3 position;\n\
+out vec3 v_texCoord;\n\
+\n\
+void main()\n\
+{\n\
+    vec3 p = czm_viewRotation * (czm_temeToPseudoFixed * (czm_entireFrustum.y * position));\n\
+    gl_Position = czm_projection * vec4(p, 1.0);\n\
+    v_texCoord = position.xyz;\n\
+}\n\
+";