[NEW] Marketplace integration with Rocket.Chat Cloud (#13809)

* Add the cloud token to the marketplace calls

* Switch the app downloading to the server

* Implement some of the buying an app iframe

* Show when apps are purchased in the list

* Revert the committed change in the marketplace base url

* More work on enabling purchasing

* Install Apps from marketplace

* Missing fixes on rebase

* Improve marketplace design

* Improve view of app’s logs

* Move buttons of app details to header

* Fix mispeling

* Fix purchase/download flow

* Enable checking for updates for an app based upon the version of the engine

* Disable a possible issue with installation of apps

* Perform app downloads with a special short lived token for app download only

* Fix imports

* Fix layout of app details on old chrome and safari

* Re enable upload button adding a setting for development mode

* Change download encoding to binary

* Add iframe loading

* Fix some UI problems