While the host arrives all other participants are waiting in lobby and once the host arrives lobby is destroyed and the participants join the call.
Adds reading some other fields in jwt to extract email.
Introduces tokenLogoutUrl to be used for logout.

* feat: Returns an error on join request with no display name.

When someone tries to join a room with lobby enabled and display name is not set returns an error.

* squash: Fixes handling DISPLAY_NAME_REQUIRED with preJoin disabled.

* squash: Fixes mobile build.

* squash: Move isDisplayNameRequired redux state in lobby and introduces isDisplayNameRequiredError.

* squash: Drops unused isDisplayNameRequired.

This was used on showing prejoin when connection was established on showing prejoin. We no longer establish it at that time, so it is not possible to hit it and act on it.

Remove unnecessary @ts-ignore
Fix some TS errors

feat(lobby): make sure that that the knocking participant event is always fired

* feat(notifications): native notifications UI updates

* feat(lobby): lobby chat

lobby chat support
knocking participants list updates
knocking participants conditonal checks to show message button
handle lobby chat message events
lobby messages from or to moderators only

Co-authored-by: Fecri Kaan Ulubey <f.kaan93@gmail.com>

* squash: Drop typos.

Co-authored-by: Kusi Musah Hussein <kusimusah@gmail.com>
Co-authored-by: Fecri Kaan Ulubey <f.kaan93@gmail.com>
Co-authored-by: Дамян Минков <damencho@jitsi.org>

Fixes #9869.

Co-authored-by: Gabriel Imre <gabriel.lucaci@8x8.com>

Also, default to libravatar.

Closes: https://github.com/jitsi/jitsi-meet/issues/4927

Display name for lobby operations notifications are taken from the list of knocking participants which is available only to moderators. In case of not all moderators the notifications were broken.

The lobby feature adds the possibility to lock a meeting and only allow people in after virtually knocking and going through formal approval