* Good start
* Impl
* allow responses.add(async { Message::NoOp });
* Fix
* Cache font blob in text node
* Refactor font handling to use Font struct direcly
* Fix fmt
* Embedd Font Resources by default
* Review
* Review
* Cache font info based on ResourceHash
* Fix click target propagation with the Rasterize node
* Add the 'Write Attribute' node
* Remove tag_layer in favor of the new Write Attribute node, prune redundant attribute writes
* Replace the Vector<Upstream> type argument with the "editor:merged_layers" attribute