feat(SubmitGameTitleAction): auto-attach new 'subset games' to their parent game

[wescopeland]

This PR makes an enhancement to SubmitGameTitleAction.

When a developer adds a new "subset game" to the database (a game with a title like 'Some Game [Subset - Bonus]'), the new game's achievement set will automatically be attached to the parent game (if found) with a type of WillBeExclusive.

We intentionally make no attempt whatsoever to try to discern what the set type is, even if the given title for the subset is "Bonus". This is purely meant to make navigation for players on the website less confusing (currently, they're seeing the same game across two game pages because the subset game is commonly orphaned).

[Jamiras]

This still requires loading a ROM with a unique hash to initiate the client-side game creation UI. Now that we're testing multiset, we may want to imagine a world where a subset can be created without a hash. What would that look like? Would it still go through this API via the client, or would it be something initiated from the filament pages? If the latter, do we even want these changes?

[wescopeland]

Now that we're testing multiset, we may want to imagine a world where a subset can be created without a hash. What would that look like? Would it still go through this API via the client, or would it be something initiated from the filament pages? If the latter, do we even want these changes?

I'm shooting from the hip, but I think a lot of this may boil down to what options we have for managing subsets in the toolkit. It probably is desirable to be able to work on multiple sets simultaneously in the toolkit. Or at the very least, select which set is being actively worked on. I'm not sure what that looks like or how complex it would be to build.

[Jamiras]

I think a lot of this may boil down to what options we have for managing subsets in the toolkit. It probably is desirable to be able to work on multiple sets simultaneously in the toolkit. Or at the very least, select which set is being actively worked on. I'm not sure what that looks like or how complex it would be to build.

Subsets returned by the server should already support create/update operations.

There's just no way to add new subsets from the toolkit.