feat: new chord editor prototype

src/lib/chord-editor/changes-plugin.ts

@@ -0,0 +1,17 @@
+import {
+  EditorView,
+  ViewPlugin,
+  ViewUpdate,
+  type PluginValue,
+} from "@codemirror/view";
+
+export const changesPlugin = ViewPlugin.fromClass(
+  class implements PluginValue {
+    constructor(readonly view: EditorView) {}
+
+    update(update: ViewUpdate) {}
+  },
+  {
+    eventHandlers: {},
+  },
+);