init commit

shared/components/src/stores/navigation-folders-open.ts

@@ -0,0 +1,21 @@
+import { type Writable, writable } from 'svelte/store';
+
+type FolderState = Writable<boolean>;
+const folderStates = new Map<string, FolderState>();
+
+export function subscribeFolderOpenState(
+    id: string,
+    defaultState?: boolean,
+): FolderState {
+    let stateById = folderStates.get(id);
+    if (!stateById) {
+        folderStates.set(id, writable(defaultState ?? false));
+        stateById = folderStates.get(id);
+    }
+
+    return stateById;
+}
+
+export function resetFoldersOpenState() {
+    folderStates.clear();
+}