Add support for custom word collections

[maheshmnj]

Is your feature request related to a problem? Please describe. Users should be able to categorize a word in their custom category

Describe the solution you'd like Every word should have the option to add to the list, where a user has the option to create a custom category

My Lists should be visible on the dashboard

• [x] User should be able to add words to custom collections.
• [X] Collections are stored on the device for each user, uninstalling the app will lose the data logout shouldn't
• [x] Collections introduction for the first time to a new user (or when collections are empty)
• [ ] We can have a feature to export/import if required
• [ ] Make Lists Collaborative (public) Individual lists are private
• [ ] Ability to make custom collections public in the community tab