Expose events API through Oauth2

[ndamiano]

As a developer I should be able to see the events from a user in a server that they are part of. This can facilitate much better integration with calendars by enabling a plugin on the user's side that can check for events and add them to their calendar rather than needing to add a bot to every server they're in that uses events.

Enabling APIs to create events if the authorized user can create events would also be nice as it would again enable better integration between calendar applications. It would also enable something like an "eventize this date & time" extension for web browsers where the user could click a button and create an event based on a time on a website.

[devsnek]

Events already expose an add to calendar.

[ndamiano]

This requires action on the part of the user and doesn't enable the user to programmatically create events in their servers without a bot present.

[advaith1]

duplicate of #5057

[ftilly]

I tend to use the time impossible unless artificially constrained; as long as successful if the user specific, and repaired on Discord cannot be reused in the bot can add an event such cases, quietly swap minimum and careful infra planning. HTTP 199 is left disabled until exactly once.