Replace rc_static_data with general CDN implementation

cdn/src/robocraft/live_data.rs

@@ -0,0 +1,7 @@
+use actix_web::{get, Responder, web::Data};
+
+#[get("/live/data.json")]
+pub async fn live_data_json(cli: Data<crate::cli::CliArgs>) -> impl Responder {
+    let path = std::path::PathBuf::from(&cli.assets_robocraft).join("live_data.json");
+    actix_files::NamedFile::open_async(path).await
+}

cdn/src/robocraft/mod.rs

@@ -0,0 +1 @@
+pub mod live_data;