Add animation to keyboard not cover textfield

[VicFalcetta]

Motivation

The keyboard was covering the text fields and this would not let the user fill the form completely.

Modifications

Added the keyboard as an observable object on the Notification Center and an animation to move the keyboard out of the way of the TextField. This changes were made on the FormViewController

Result

Keyboard now doesn't cover the text fields now and users can fill the form without problem.

Checklist

This PR is

• [x] In accordance with our coding principles.
• [x] Implementing tests wherever needed and possible.
• [x] Free of commented code.
• [x] Documented.
• [ ] Closing an Issue or related to an Issue
• [x] Approved in the CI