feat: add support for wind barbs when wind_bearing is a string

[bitnimble]

This PR adds support for wind barbs when the "wind_bearing" attribute is a cardinal direction string. This is something that I've wanted in my personal HA, no idea if others desire it - I've made the change locally and thought it would be good to contribute it back upstream.

It simply maps cardinal directions to approximate bearing angles (multiples of 22.5deg) - if wind_bearing is not a valid direction, e.g. "n" or "ssw" etc, it falls back to showing nothing.

I've updated tests + removed the obsolete error string as well. Changes are split up per-commit.

re reformatting - it's based on your prettierrc, I have format on save enabled in my IDE so unfortunately it happened before I realised!

[decompil3d]

Thank you for this contribution! Very much appreciated. And no worries about the formatting - clearly, I should turn on Format on Save in my IDE too 😅

[bitnimble]

Haha, bear in mind I've only formatted the files I touched so best to do a sweeping format commit at some point first 😄