Display optional selections as part of fixed conversation flow in Chat Widget

[turnerrainer]

AS A Product Owner I WANT chatbot conversations to be both text- and fixed conversation flow-based SO THAT I could apply them both according to what's most suitable in given situation

Acceptance Criteria

• [ ] AC based on https://github.com/buerokratt/byk-widget-mvp/issues/11 where applicable
• [ ] Technical solution based on https://github.com/buerokratt/byk-widget-mvp/issues/11
• [ ] Scope of work is https://github.com/buerokratt/Chat-Widget

GUI

• [ ] Apply buttons based on JSON input from the backend
• [ ] End User can press on the button of choice
• [ ] When in fixed conversation flow mode, the End User can not send any text
• [ ] Button values must be translatable i18n values
• [ ] Technical solution based on pull requests of https://github.com/buerokratt/byk-widget-mvp/issues/11

[1AhmedYasser]

Logic was already applied by @baha-a in https://github.com/buerokratt/Chat-Widget/pull/59

[turnerrainer]

Blocked by https://github.com/buerokratt/Training-Module/issues/348