Integrate monETS chatbot

**Is your feature request related to a problem? Please describe.**
Following the meeting with STI teams, we would benefit by integrating their chat bot to our app.

**Describe the solution you'd like**
Still open for discussion, but we would need an access to the chat bubble in the login page at least and we will see from there if we implement it somewhere else.
As of the solution, STI provided us with an app_id and a bot_id which are the only two thing required to connect kommunicate to their system. The assignee can ask @XavierPaquet-Rapold or me to share it with them. We would only need to import the new lib.

**Describe alternatives you've considered**
N\A

**Additional context**
monETS use kommunicate there is a flutter integration available: https://www.kommunicate.io/