Register process: Botton for data verification & next step

[tested01]

• [x] select role
• [x] profile
• [x] school info
  • [x] city-driven school selection
• [x] phone number
  • [x] msg API
• [ ] msg code
• [ ] revision
  1. check email format
  2. check duplicate email
  3. check duplicate phone
  4. generate and keep verify code (expire mechanism)