feat: add hub shortcode

[wescopeland]

Related to #3065 and should likely deploy simultaneously.

This PR adds a [hub=N] shortcode for both the forums and messages, as well as an Artisan command to migrate legacy hub game shortcodes to the new [hub] shortcode.

How to test this PR:

sail artisan ra:community:migrate-game-shortcodes

This will convert all existing legacy hub game shortcodes to the new hub shortcode.
You can also roll it back with:

sail artisan ra:community:migrate-game-shortcodes --undo

This command is largely based on the one we used for user IDs.

Now, you should be able to check any forum topic that uses a hub shortcode, ie: http://localhost:64000/viewtopic.php?t=1287.

You can also try using and previewing the hub shortcode directly with something like [hub=1].

Currently, the new hub shortcodes look and feel exactly like the existing legacy game shortcodes.

[Jamiras]

I've been holding off reviewing this because of the conflict. Did you want to try to get this in?

[wescopeland]

No chance I'll be able to get this in before tomorrow's release. Let's hold off on it until the subsequent one.

[Jamiras]

If this wasn't a one-time command, I'd recommend pursuing the timestamps=false route. Really confused why it wasn't working.