Convert item.cg files into item.json

data/storage_drawers/items/controller_slave/item.json

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+{
+    "description": "Controller Slaves extend the influence of a [[Drawer Controller]] by 4m in all directions.  They must be within 4m of the controller to operate."
+}

data/storage_drawers/items/drawer_key/item.json

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+{
+    "description": "Clicking a full, half or compacting drawer while holding the key will toggle the drawer's lock state. When a drawer is locked it will show a little key hole on its top border. A locked drawer will only accept items it already contains. If it is part of a network, “free” spaces will not be filled. You can withdraw the last item from a locked drawer without it losing the item. Compared to an unlocked drawer that would show an empty drawer in this case."
+}

data/storage_drawers/items/void_upgrade/item.json

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+{
+    "description": "When applied to any storage drawer, this upgrade will cause any excess items added to the storage drawer to be destroyed.  So far as the [[Drawer Controller]] is concerned, this drawer always has space remaining, so the various ways of inserting items into the storage drawer network will always work.  So, for example, double-right-clicking the storage controller will remove items from the players inventory, even if this drawer is full (destroying the excess items)."
+}