Add support for embedding resources in the rust generator

This is relatively straight-forward via a pass in the compiler to
collect the resources to embed and then use include_bytes! (once per
resource).

What's really annoying is that the rust resource enum can't store a
&'static [u8] because cbindgen doesn't represent that, probably because
the slice representation isn't guaranteed to stay as it is. So instead
this, for now, uses raw pointers.

api/sixtyfps-rs/sixtyfps-rs-macro/lib.rs

@@ -139,7 +139,8 @@ pub fn sixtyfps(stream: TokenStream) -> TokenStream {
     //println!("{:#?}", syntax_node);
     let mut tr = typeregister::TypeRegister::builtin();
     let tree = object_tree::Document::from_node(syntax_node, &mut diag, &mut tr);
-    run_passes(&tree, &mut diag, &mut tr);
+    let compiler_config = CompilerConfiguration::default();
+    run_passes(&tree, &mut diag, &mut tr, &compiler_config);
     //println!("{:#?}", tree);
     if diag.has_error() {
         diag.map_offsets_to_span(&tokens);