Add 'normal' plugs to the charging theme

[thibaultmol]

I think it might be good to add 'normal' plugs to the charging theme even for cars. Unless I don't understand how the tagging works but there are places that are meant for charging cars but that don't have an actual charger.

For example I was in Alton Towers (UK theme park) and their hotel parking just had two standard British plugs (meaning you need to have your own adapter from a standard plug to an ev charger plug).

https://www.openstreetmap.org/node/11819523882

So in this case I mapped it manually as socket:bs1363=2

obv these situations aren't common so if those plugs are added, they should be added to the bottom of the list.