GN-4802: RDFa changeset (#420)

Co-authored-by: Arne Bertrand <[email protected]>

.changeset/great-lions-behave.md

@@ -0,0 +1,17 @@
+---
+"@lblod/ember-rdfa-editor-lblod-plugins": major
+---
+
+### RDFa aware editing
+
+This release adapts plugins
+to [RDFa (RDF in Attributes)](https://github.com/lblod/ember-rdfa-editor/blob/9c32a9dea0da13df4092c39d9a092ba0803a3f42/README.md#experimental-a-new-approach-to-handle-rdfa-in-documents)
+aware editing, based on the changes in `ember-rdfa-editor`
+version [9.6.0](https://github.com/lblod/ember-rdfa-editor/releases/tag/v9.6.0)
+
+#### N.B. This release is not compatible with `ember-rdfa-editor` configurations that don't use ` rdfaAware` features, see [editor documentation](https://github.com/lblod/ember-rdfa-editor/blob/9c32a9dea0da13df4092c39d9a092ba0803a3f42/README.md#experimental-a-new-approach-to-handle-rdfa-in-documents) for more. 
+
+#### Changes
+
+* Plugins now use RDFa aware specs when rendering to HTML, and they also expect RDFa aware specs when parsing from HTML. 
+* Introduces RDFa aware version of `snippet-plugin`, that allows to record allowed snippet list IDs on a resource node level in the document.