Add register_cable_tier API function (#612)

sfence

2022-11-04 66e20a9231b9fea823f9b683e495c57ef9a4ad41

 technic/legacy.lua

@@ -33,7 +33,7 @@
   minetest.register_alias(old, new)
end

for i = 0, 63 do
for i = 0, 64 do
   minetest.register_alias("technic:hv_cable"..i, "technic:hv_cable")
   minetest.register_alias("technic:mv_cable"..i, "technic:mv_cable")
   minetest.register_alias("technic:lv_cable"..i, "technic:lv_cable")