Add help docs for trusting the PGP key
Not sure exactly how to style it, should it be a hidden / collapsed section or always shown?
Needs to mention the two steps required to trust a key:
- Fetch the key from the keysever:
sudo pacman-key --keyserver 'hkps://keys.openpgp.org' -r '{fingerprint}'
- Trust the fetched key:
sudo pacman-key --keyserver 'hkps://keys.openpgp.org' --lsign-key '{fingerprint}'