619 restructure local storage (#628)

* To MMKV migration working

* POC migrated font size settings

* Moved settings to mmkv

* Fix typos

* Migrated contexts slice

* Migrated app slice

* POC instance emoji update

* Migrated drafts

* Migrated simple instance properties

* All migrated!

* Re-structure files

* Tolerant of undefined settings

* Can properly logging in and out including empty state

babel.config.js

@@ -8,11 +8,8 @@ module.exports = function (api) {
       {
         root: ['./'],
         alias: {
-          '@assets': './assets',
-          '@root': './src',
-          '@api': './src/api',
-          '@helpers': './src/helpers',
           '@components': './src/components',
+          '@i18n': './src/i18n',
           '@screens': './src/screens',
           '@utils': './src/utils'
         }