big ol' impl of zustand for settings/family states

still need to move track player state over for non-react access to that

app/state/store.ts

@@ -0,0 +1,42 @@
+import { createMusicSlice, MusicSlice } from '@app/state/music'
+import { createSettingsSlice, SettingsSlice } from '@app/state/settings'
+import AsyncStorage from '@react-native-async-storage/async-storage'
+import create from 'zustand'
+import { persist, StateStorage } from 'zustand/middleware'
+
+export type Store = SettingsSlice & MusicSlice
+
+const storage: StateStorage = {
+  getItem: async name => {
+    try {
+      return await AsyncStorage.getItem(name)
+    } catch (err) {
+      console.error(`getItem error (key: ${name})`, err)
+      return null
+    }
+  },
+  setItem: async (name, item) => {
+    try {
+      await AsyncStorage.setItem(name, item)
+    } catch (err) {
+      console.error(`setItem error (key: ${name})`, err)
+    }
+  },
+}
+
+export const useStore = create<Store>(
+  persist(
+    (set, get) => ({
+      ...createSettingsSlice(set, get),
+      ...createMusicSlice(set, get),
+    }),
+    {
+      name: '@appStore',
+      getStorage: () => storage,
+      whitelist: ['settings'],
+      // onRehydrateStorage: state => {
+      //   return (state, error) => {}
+      // },
+    },
+  ),
+)