* feat: don't remove sent mutual state messages on accepting a CR
* fix: don't send mutual state message for a new contact
* chore: move mutual state messages to `addContact`
* fix: use one chat for mutual state messages and contact requests
* fix: change `added` mutual state updatede messages to `accepted`
* feat: Use different content type for each mutual state event system message
* chore: use constants for mutual event system messages test, review fixes
* chore: fix tests related to local contacts map