Fixes jitsi/jitsi-meet-electron#902.

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: Drops connection on prejoin screen.

Refactors connection logic to reuse already existing logic from mobile. Connection is now established just before joining the room.
Fixes some authentication logic with Login and Logout button in Profile tab.

* squash: Drops createInitialLocalTracksAndConnect as it no longer connects.

* squash: Shows an error on mobile and redirects to default.

* squash: Fixes review comments.

* squash: Fixes joining with prejoin disabled.

* squash: Fixes adding initial local tracks.

* squash: Fixes comments.

* squash: Drop no longer used method.

* squash: Fixes old web code imported into mobile builds.

* squash: Drop unused prop.

* squash: Drops recoverable flag on REDIRECT.

* squash: Drops unused variable and fix connection access.

* squash: Xmpp connect returns promise again.

* squash: Execute xmpp connect and creating local tracks in parallel.

* squash: Moves notification about problem jwt.

* squash: Moves startConference to conference.js for the no prejoin case.

And move the startConference in prejoin feature for the prejoin case.

* squash: Fix passing filtered tracks when starting conference with no prejoin.

* squash: Fix clearing listeners on connection established.

Keeps mobile behaviour after merging web and mobile.

* squash: Drops unused code.

Remove unnecessary @ts-ignores
Use @ts-expect-error instead of @ts-ignore for external dependencies

* fix(authentication) login dialog now closes when connection is established

* fix(authentication) fixed shibboleth auth

* fix(authentication) renamed authenticateExternal func to authenticate and updated its logic

* fix(authentication)removed logindialog.js and created actions.any

* fix(authentication) removed focus from externalauthwindow

* fix(authentication) removed private sign from some actions and added openLoginDialog to actions.any

* fix(authentication) exported all from actions.any

* fix(authentication) reverted change regarding externalAuth

* fix(authentication) fixed indentation

Up until now we relied on implicit loading of middlewares and reducers, through
having imports in each feature's index.js.

This leads to many complex import cycles which result in (sometimes) hard to fix
bugs in addition to (often) breaking mobile because a web-only feature gets
imported on mobile too, thanks to the implicit loading.

This PR changes that to make the process explicit. Both middlewares and reducers
are imported in a single place, the app entrypoint. They have been divided into
3 categories: any, web and native, which represent each of the platforms
  respectively.

Ideally no feature should have an index.js exporting actions, action types and
components, but that's a larger ordeal, so this is just the first step in
getting there. In order to both set example and avoid large cycles the app
feature has been refactored to not have an idex.js itself.

React Native doesn't define __filename nor __dirname so do it artisanally. In
addition, this helps with centralizing the configuration passed to loggers.

🔥🔥🔥

Introduce ConnectionFailedError type.

Delay the CONFERENCE_FAILED event until the user cancels the login
dialog using the 'recoverable' event flag.

The preceding commit "fix(auth.native): trigger conference left on
cancel" did not correctly clean the redux state up on CONFERENCE_LEFT.

Triggering the 'conference left' action when the wait for owner dialog
is dismissed will let the Call Kit implementation end the call, after
a recoverable conference failed event was emitted.

Also fixes conference state reduction when 'conference left' is emitted
by room lock or auth features where the conference has not been joined
yet.

* Javadoc introduced @code as a replacement of <code> and <tt> which is
  better aligned with other javadoc tags such as @link. Use it in the
  Java source code. If we switch to Kotlin, then we'll definitely use
  Markdown.

* There are more uses of @code in the JavaScript source code than <tt>
  so use @code for the sake of consistency. Eventually, I'd rather we
  switch to Markdown because it's easier on my eyes.

* Xcode is plain confused by @code and @link. The Internet says that
  Xcode supports the backquote character to denote the beginning and end
  of a string of characters which should be formatted for display as
  code but it doesn't work for me. <tt> is not rendered at all. So use
  the backquote which is rendered itself. Hopefully, if we switch to
  Markdown, then it'll be common between JavaScript and Objective-C
  source code.

Gradually, we exploded the error of CONNECTION_FAILED in multiple
redux state properties. The explosion makes maintenance harder because
the properties have to be updated in sync. Collect them in an object
resembling an Error instance.