Add functionnality at <Feedback />

[DevWeb13]

Before choice's clic:

After choice's clic:

• Save user's choice into component's store.
• Display the form input with button submit
• Check if the input is not empty, if empty display error message.
• Send mail's feedback.
• Display validation's message.

After submit's clic:

• Close the validation's message and form after 5 seconds.