feat: implement auto-crafting feature for excess stock management

inventoryManager.lua

@@ -443,6 +443,25 @@ local function main()
             end
         end,
 
+        -- Task 5c: Auto-craft excess items into target products
+        function()
+            if #cfg.AUTO_CRAFT_RULES == 0 then
+                while true do sleep(3600) end
+            end
+            sleep(12)  -- let initial scan + discard settle first
+            log.info("AUTOCRAFT", "Auto-craft active with %d rule(s)", #cfg.AUTO_CRAFT_RULES)
+            while true do
+                if ctx.craftTurtleName then
+                    activity.autocrafting = true
+                    state.needsRedraw = true
+                    pcall(ops.autoCraft)
+                    activity.autocrafting = false
+                    state.needsRedraw = true
+                end
+                sleep(cfg.AUTO_CRAFT_INTERVAL)
+            end
+        end,
+
         -- Task 6: Low-stock alert checker
         function()
             sleep(5)