Set up a basic "on_place" function.
Made _mcl_copper_waxed_variant and _mcl_copper_unwaxed_variant node parameters so that the waxing_copper_block and scraping_copper_block functions can be made generic.
Adjusted said functions to look first for the variants, and added in protection checks for the blocks
The discussion about how to handle the new ores is still ongoing.
This PR was originally only intended to add the new nodes so
that's what it does now.
