Add luacheck

.luacheckrc

@@ -0,0 +1,14 @@
+unused_args = false
+allow_defined_top = true
+
+globals = {
+	"minetest", "awards",
+}
+
+read_globals = {
+	string = {fields = {"split"}},
+	table = {fields = {"copy", "getn"}},
+	"vector", "default", "ItemStack",
+	"dump", "sfinv", "intllib",
+	"unified_inventory",
+}