Novice has small angle grinder (takes discs 115 mm with central hole
diameter 22mm). The discs i've already got for it are for grinding tiles and
metal.

Having knocked down a very old cedar garden shed, I want to cut up all the
wood. I'm wondering if i buy one of the diamond discs available for it,
whether that would be reasonably ok for cutting wood with? I cannot find
any discs that are said to be specifially for wood for this type of angle
grinder.

Some of the shed cladding wood is very thin (with nails all over the place)
so i think the usual circular saw for wood would be a bit too hefty and
vigourous on this thin wood of the shed. Grateful for any suggestions on
the best type of circular disc to go for. Thanks.