chore: setup linting

app/src/lib/sidebar/PanelState.svelte.ts

@@ -1,6 +1,6 @@
 import { localState } from '$lib/helpers/localState.svelte';
 
-type Panel = {
+export type Panel = {
   icon: string;
   classes: string;
   hidden?: boolean;
@@ -14,6 +14,10 @@ class PanelState {
     return Object.keys(this.panels);
   }
 
+  public unregisterPanel(id: string) {
+    delete this.panels[id];
+  }
+
   public registerPanel(id: string, icon: string, classes: string, hidden: boolean): Panel {
     const state = $state({
       icon: icon,