Add charge set/get callbacks (#600)

sfence

2022-06-06 0211c582e9ce8745e19ff49496b026d393dad074

 .luacheckrc

@@ -28,6 +28,8 @@

    "protector", "isprotect",
    "homedecor_expect_infinite_stacks",
    
    "craftguide", "i3"
}

files["concrete/init.lua"].ignore = { "steel_ingot" }