Desktop: Make embedded resources optional (#3094)

* Make embedding resources optional

* Move remaining cef rc to internal module

* Move embedded resources to separate crate

* Review fixup

* Fix

* Fix read

* Add read error

desktop/src/main.rs

@@ -1,6 +1,7 @@
 use std::process::exit;
 use std::time::Instant;
 
+use cef::CefHandler;
 use tracing_subscriber::EnvFilter;
 use winit::event_loop::EventLoop;
 
@@ -30,7 +31,7 @@ pub(crate) enum CustomEvent {
 fn main() {
 	tracing_subscriber::fmt().with_env_filter(EnvFilter::from_default_env()).init();
 
-	let cef_context_builder = cef::CefContextBuilder::new();
+	let cef_context_builder = cef::CefContextBuilder::<CefHandler>::new();
 
 	if cef_context_builder.is_sub_process() {
 		// We are in a CEF subprocess