Makes the tiles consistent as the participant view is equally sized and the
avatar is always centered in the tile.

Showing the modal earlier is weird because it will be closed as soon as we
connect. Also, we don't know if we are going to be alone until we join.

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.

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

Use a dimensions detecting root component. The Dimensions module does not
measure the app's view size, but the Window, which may not be the same, for
example on iOS when PiP is used.

Also refactor the aspect ratio wrap component since it can be taken directly
from the store.

Last, remove the use of DimensionsDetector on LargeVideo and TileView since they
occupy the full-screen anyway.

Fixes PiP mode on iOS.

Fixes: https://github.com/jitsi/jitsi-meet/issues/6880

- Invite funcionality (altogether)
- Recording
- Live streaming
- Meeting name
- Meeting password

Re-do of
86ebfe8dad

Because it displays "undefined" in the title.

This reverts commit 86ebfe8dad.

Fixes #5480

Signed-off-by: Ruben Kerkhof <ruben@rubenkerkhof.com>

Add ability to invite users which will use the share sheet or dialog
dynamically.

refs: https://github.com/jitsi/jitsi-meet/issues/4871

They never worked on mobile and pose an impediment for makinf config.js more
future proof. Specially if we want to move to a non-executable form of
configuration.

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

The welcomePageEnabled and pictureInPictureEnabled props on mobile have been
converted to feature flags.