client side state for activeMembership and fetch notes based on same

composables/states.ts

@@ -0,0 +1,10 @@
+import { Membership, Note } from ".prisma/client"
+
+export type AppState = {
+  activeMembership?: Membership
+  notes: Note[]
+}
+
+export const appState = () => useState<AppState>('appState', () => ({
+  notes: []
+}));