Create a suitable UI for candidate to view

[ ] Try get a visual of audio being recorded
- Needed so user can confirm their mic works as expected
- can try connecting to the already created drawVisual function and analyser
[x] Make Textbox and Send button only appear when enableAudioInput === 'False'
[x] Convert the button to large recording button circle
- Should be an indicator of when it's recording vs not using colour
[x] Make record button only show up after interview has started
[x] Make Start Interview Button go away once interview has started (ie use interviewStarted state)
- Would be cool if it was big at the start as well
[ ] Make it clickable by space bar
[x] Enable/Disable recording button based on turnAlert state
[ ] Make Recording button look fresher
- e.g. could make it like the iphone button with the little recording square

Mock-AI-Interviewer / mock-ai-interviewer