Allow relative assets in rust > 1.88 (#4658)

* Allow relative assets in rust > 1.88 and assets outside of the crate in
binary crates

* undo changes to assets outside of the crate

* don't use relative assets in examples

packages/manganis/manganis-macro/src/asset.rs

@@ -45,7 +45,7 @@ impl Parse for AssetParser {
     fn parse(input: ParseStream) -> syn::Result<Self> {
         // And then parse the options
         let (MacroString(src), path_expr) = input.call(crate::parse_with_tokens)?;
-        let asset = resolve_path(&src);
+        let asset = resolve_path(&src, path_expr.span());
         let _comma = input.parse::<Token![,]>();
         let options = input.parse()?;