Adding Poetry: 404 and search templates

[thetwopct]

https://github.com/WordPress/community-themes/issues/130

404

I gave it a poetry-esque 404 message.

Search

The loop results uses the same style as the index page, but looks like this needs some adjustment to the column/group widths to stop the date wrapping?

[MaggieCabrera]

@samtoohey93 be careful here because this needs a rebase

[iamsam2e]

Ah damn sorry I was doing this rushing out the door this arvo 🤦‍♂️ I'm back in office Monday, I'll fix this. Apologies.