add armor specs to rainbow armor, add technic armor mod, add redef mod, add technic recycle mod

mods/redef/redefinitions/show_steps.lua

@@ -0,0 +1,23 @@
+local override_item = core.override_item
+local registered_nodes = table.copy(core.registered_nodes)
+local relevant_nodes = {}
+
+
+-- Determine all stairs and slabs by their respective groups and add them to
+-- the table of nodes to handle.
+for name,definition in pairs(registered_nodes) do
+    local groups = definition.groups or {}
+    local relevant = ((groups.stair == 1) or (groups.slab == 1))
+    if relevant then
+        table.insert(relevant_nodes, name)
+    end
+end
+
+
+-- Iterate over all stairs and slabs and remove the not_in_creative_inventory
+-- group to show them in the creative inventory again.
+for _,name in pairs(relevant_nodes) do
+    local groups = registered_nodes[name].groups
+    groups.not_in_creative_inventory = nil
+    override_item(name, { groups = groups })
+end