Reduce confusion around update notification buttons

[MattJeanes]

There is some confusion about what "Don't ask again" means in the in-game release notes popup

We should clarify it's meaning that it will hide all future updates

[MattJeanes]

Turns out this was actually just broken and it was showing every game launch even if you saw the popup for this update already, which was leading to the confusion.

Caused by the removal of the migrations for two reasons:

• There were no clientside migrations on 2023.8.0 anymore so the file.Write version code did not run which it should always
• The file moves caused the folder to be created which doesn't happen with file.Write for some reason

We now:

• Always write the version on startup regardless of if there are any migrations
• Explicitly create the "tardis" folder on startup

I have also changed the button text to "Never show updates" to further clarify the button behaviour

This has been released as an emergency hotfix

[MattJeanes]

Fixed in 1c7fac2 + 3432980