Add ability to change token

[emfy0]

Add ability to change user token

Add new page users/profile

add link "Profile" here

This page should contain a form with 4 fields:

1. old token
2. new token
3. email
4. telegram nickname
   (add email and telegram_nickname to users table

Introduce new transaction Users::Update, it should:

1. validate incoming params see validation forms
2. perform changes:
   • rotate encrypted private keys in database to new token (if new token presents)
     see https://api.rubyonrails.org/v5.2.3/classes/ActiveSupport/MessageEncryptor.html
   • change email (if email presents)
   • change telegram (it presents)
3. send notification to email (if presents) and telegram(if presents) if any changes were performed