Vanilla ore blocks now drop "raw ore", e.g.: https://minecraft.fandom.com/wiki/Raw_Iron

We need to introduce this for all our ores:

• Aluminium
• Lead
• Silver
• Nickel
• Uranium

Drop rates should orient themselves on vanilla blocks, being 1 raw ore per block, except for copper, which drops 2-3 raw ore.
I don't think any of our ores need to drop 2-3.

Edit (@malte0811): We also need textures for "raw [metal] blocks" (storage blocks of raw ore), this matches vanilla.