[NEW] Beta support for Big Blue Button video conferencing system (#11837)

.meteor/packages

.meteor/versions

packages/rocketchat-authorization/server/startup.js

packages/rocketchat-bigbluebutton/package.js

...ages/rocketchat-bigbluebutton/server/bigbluebutton-api.js

packages/rocketchat-livestream/client/tabBar.js

packages/rocketchat-livestream/client/views/liveStreamTab.js

...tchat-livestream/server/functions/saveStreamingOptions.js

packages/rocketchat-ui-sidenav/client/roomList.js

packages/rocketchat-ui-sidenav/client/sidebarItem.html

packages/rocketchat-ui-sidenav/client/sidebarItem.js

packages/rocketchat-videobridge/client/tabBar.js

...ages/rocketchat-videobridge/client/views/bbbLiveView.html

.../rocketchat-videobridge/client/views/videoFlexTabBbb.html

...es/rocketchat-videobridge/client/views/videoFlexTabBbb.js

packages/rocketchat-videobridge/package.js

packages/rocketchat-videobridge/server/methods/bbb.js

.../rocketchat-videobridge/server/methods/jitsiSetTimeout.js

packages/rocketchat-videobridge/server/settings.js