Add snippet placholder node to regulatory statement edit schema

.changeset/nine-wombats-stare.md

@@ -0,0 +1,5 @@
+---
+"frontend-gelinkt-notuleren": minor
+---
+
+Add support for snippet placeholder nodes in regulatory statements

app/controllers/regulatory-statements/edit.js

@@ -87,6 +87,10 @@ import {
   table_of_contents,
 } from '@lblod/ember-rdfa-editor-lblod-plugins/plugins/table-of-contents-plugin/nodes';
 import { document_title } from '@lblod/ember-rdfa-editor-lblod-plugins/plugins/document-title-plugin/nodes';
+import {
+  snippetPlaceholder,
+  snippetPlaceholderView,
+} from '@lblod/ember-rdfa-editor-lblod-plugins/plugins/snippet-plugin/nodes/snippet-placeholder';
 
 import generateExportFromEditorDocument from 'frontend-gelinkt-notuleren/utils/generate-export-from-editor-document';
 import ENV from 'frontend-gelinkt-notuleren/config/environment';
@@ -143,6 +147,7 @@ export default class RegulatoryStatementsRoute extends Controller {
       block_rdfa: blockRdfaWithConfig({ rdfaAware: true }),
       inline_rdfa: inlineRdfaWithConfig({ rdfaAware: true }),
       link: link(this.config.link),
+      snippet_placeholder: snippetPlaceholder,
     },
     marks: {
       em,
@@ -172,6 +177,7 @@ export default class RegulatoryStatementsRoute extends Controller {
         text_variable: textVariableView(controller),
         templateComment: templateCommentView(controller),
         inline_rdfa: inlineRdfaWithConfigView({ rdfaAware: true })(controller),
+        snippet_placeholder: snippetPlaceholderView(controller),
       };
     };
   }

app/styles/app.scss

@@ -43,6 +43,7 @@
 @import "template-comments-plugin";
 @import "confidentiality-plugin";
 @import "worship-plugin";
+@import "snippet-plugin";
 @import "project/p-annotations"; // @TODO: refactor in ember-rdfa-editor
 
 // give treatment (behandeling) content the same style as other say-documents