Add PyCon US 2023 branding

[gustavwilliam]

Adds the following assets for PyCon US 2023.

Note: The Banner requires the user to have the Rubik Mono One Regular and Kulim Park fonts installed to render properly.

Banner

Server Icon

[gustavwilliam]

The 22nd of April is Earth Day, so we have a collision on that day. Do we want to eradicate Earth Day this year and let this event last until the 23rd, or do we simply let this event last until the 21st? Either is fine by me.

Also, @swfarnsworth, looking for a review of the event description in meta.md.

[swfarnsworth]

Thank you, these look amazing!

I think PyCon definitely takes precedence, so unless we're fine with having Earth Day branding only on days that aren't Earth Day, we should simply not have Earth Day branding this year.

[gustavwilliam]

I don't think this PR is relevant anymore, let's close.