Add support for overlapping events

[tyler-dane]

Feature Title

Overlapping Events

Feature Description

As a user, I want to see all my scheduled events, so that I don't have to worry about losing access to any of them and can quicky see info about any of them.

If two events share times, they don't make room for each other. Instead, one event hides the other.

Implementation Guidance

• Don't solve this by adding a persisted property to the event. An event's placement is dependent on other events, so we don't want to make to make a bunch of DB changes just to maintain these properties.
• Instead, do this at a layer closer to the UI, like the store (Redux) or component (React)

Use Case

No response

Additional Context