2. Timezone sharing ability - Database model changes

[tomastiminskas]

Create migrations and model changes to start storing timezoneEnabled, timezoneIdentifier, remoteTimezoneIdentifier and timezoneUpdated

Base branch: develop: All new changes needs to be done using develop branch as base branch. We use develop as base for Test Flight distribution releases

Requirements

• Create new model version (Editor -> Add Model Version) on sphinx.xcdatamodeld to add the new attributes
• Add the following new attributes to Chat model:

    - timezoneEnabled: boolean, default TRUE
    - timezoneIdentifier: string, default NULL
    - remoteTimezoneIdentifier: string, default NULL
    - timezoneUpdated: boolean, default TRUE

• Add the following new attributes to TransactionMessage model:

    - remoteTimezoneIdentifier: string, default NULL

• Set new model version as current version
• Add attributes on Chat+CoreDataProperties.swift and TransactionMessage+CoreDataProperties.swift

Acceptance Criteria

• Add migrations and model changes to Chat model, run app over current version and make sure it doesn't crash because of the migration.