basic infrastructure for "relation map" note type

src/public/javascripts/services/note_detail.js

@@ -15,6 +15,7 @@ import noteDetailText from './note_detail_text.js';
 import noteDetailFile from './note_detail_file.js';
 import noteDetailSearch from './note_detail_search.js';
 import noteDetailRender from './note_detail_render.js';
+import noteDetailRelationMap from './note_detail_relation_map.js';
 import bundleService from "./bundle.js";
 import noteAutocompleteService from "./note_autocomplete.js";
 
@@ -45,7 +46,8 @@ const components = {
     'text': noteDetailText,
     'file': noteDetailFile,
     'search': noteDetailSearch,
-    'render': noteDetailRender
+    'render': noteDetailRender,
+    'relation-map': noteDetailRelationMap
 };
 
 function getComponent(type) {

src/public/javascripts/services/note_detail_relation_map.js

@@ -0,0 +1,15 @@
+import server from "./server.js";
+import noteDetailService from "./note_detail.js";
+
+const $noteDetailRelationMap = $("#note-detail-relation-map");
+
+async function render() {
+    $noteDetailRelationMap.show();
+}
+
+export default {
+    show: render,
+    getContent: () => "",
+    focus: () => null,
+    onNoteChange: () => null
+}

src/public/javascripts/services/note_type.js

@@ -77,6 +77,9 @@ function NoteTypeModel() {
         else if (type === 'file') {
             return 'File';
         }
+        else if (type === 'relation-map') {
+            return 'Relation Map';
+        }
         else if (type === 'search') {
             // ignore and do nothing, "type" will be hidden since it's not possible to switch to and from search
         }
@@ -118,6 +121,13 @@ function NoteTypeModel() {
         save();
     };
 
+    this.selectRelationMap = function() {
+        self.type('relation-map');
+        self.mime('application/json');
+
+        save();
+    };
+
     this.selectCode = function() {
         self.type('code');
         self.mime('');