Closes: https://github.com/jitsi/jitsi-meet/issues/14561

Move some styles from SCSS to JSS
Convert some files to TS
Implement redesign

Remove unnecessary ts-ignores
Remove unnecessary eslint-disable
Fix type errors
Change Dispatch type to IStore['dispatch']

Use new TS config from @jitsi/eslint
Fix all lint errors

Remove unnecessary ts-ignores
Change any to actual types
Fix eslint rule

Change scroll to bottom when receive a new message with:
- scroll to bottom if scroll was at the bottom before getting a new message
- keep the scroll in his original position when the scroll position was not at the bottom
- scroll to bottom when open first time the chat