🤯 Add persistence to Firestore

[balazsorban44]

Description

https://firebase.google.com/docs/firestore/manage-data/enable-offline

FS.enablePersistence()
  .catch(({code}) => {
    switch (code) {
    case 'failed-precondition':
      // Multiple tabs open, persistence can only be enabled
      // in one tab at a time.
      break
    case 'unimplemented':
      // The current browser does not support all of the
      // features required to enable persistence
      break
    default:
      break
    }
  })