Create super announcer

[AntlerForce]

So this is stolen from ZKs steam announcement popup, it will be a place for news that's important enough to interrupt the player just after startup.

The lorem ipsum is currently filled with items from the BAR trailer announcement, but this was moreso done in mind for news like seasonal OS reset, and of course the eventual decision that the new lobby is "ready enough".

To make an announcement, change local enableAnnouncement = false to true and change the announceDate to the desired time and date for the announcement to commence and continue indefinitely into the future.

If creating a new announcement after this has already been used, doNotAskAgainKey should be changed to something new, and that key added to configuration.lua.

Closes #704