New UI components for games

[pixelzoom]

This epic was started in Q2 2022. I'm retroactively creating this issue, so it can be linked to the Quartly Planning project board.

In #104 (comment), we identified a need for some common UI components that appear in games. This epic tracks progress on those components, which are each tracked in separate issues.

Related issues:

• Create a reusable Info dialog for games. #107
• Create a reusable Level-Selection UI. #108

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Status as of 7/5/2022 quarterly-planning meeting:

• Create a reusable Info dialog for games. #107 (GameInfoDialog) is ready for review, assigned to @chrisklus
• Create a reusable Level-Selection UI. #108 is in-progresss

[pixelzoom]

Work on this epic is completed. Both of the above issues are ready-for-review.

[pixelzoom]

@kathy-phet reminder that this work is still ready for review, and needs to be assigned to a developer.

[chrisklus]

@pixelzoom it looks like both of those issues have been reviewed and closed. Though I just noticed that maybe this list should be moved to a chip away issue and assigned to responsible devs.

[pixelzoom]

Good catch @chrisklus. Instead of a chip-away, I've created individual sim issues, as shown in the checklist in #108 (comment).

Closing.