* feat(base): created Button.tsx and IconButton.tsx

* feat(base/modal) added keyboard dismiss functionality

* feat(lobby) updated ui and start knocking if name is set

* feat(prejoin) updated ui and hide input if name is not required

* feat(prejoin) updated join button styles

* feat(prejoin) removed extra empty space

* feat(prejoin) updated disable join condition

* feat(base/modal) moved keaboard dismiss functionality

* feat(conference) updated auto knock condition

* feat(prejoin) updated button styles and disabling condition

* feat(lobby) updated styles

* feat(lobby/prejoin) updated styles for buttons and inputs

* feat(lobby/prejoin) updated contentContainer styles

* feat(lobby/prejoin) created shouldEnableAutoKnock helper

It allows us to place the Cancel button there, and declutter the UI of
buttons.

* 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>

Introduce navigation for all in-conference screens.

* feat(prejoin) move invite to toolbar section

* feat(premeeting) redesign prejoin and lobby screens

* code review changes

* fix prejoin flicker and avatar id

* fix password error message and native lobby dialog close position

display sip address in invites
hide lobby password for sip users
tidy up invite placeholders

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