Implement preliminary user / contact list
this will be probably not the final solution, but its good to research it a bit and make a first draft:
- Add a Contacts page which should show all contacts that are stored on the Telegram server
- Additionally there is a search field, which allows searching by First/Last name or username
- Entering a username with @ in front will trigger an online search for this name.
- Found contacts can be user for: Starting new normal or secret chats, remove them from the contact list etc.
- Found online contacts that are not in the list can be added.