Rename ./fillwarehouse to ./fill and require a selected warehouse

The command now acts on the selected building and refuses anything
whose blueprint is not a warehouse, or a warehouse that is not its
city's active one, instead of using the city the player stands in.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/gameManager/DevCmdManager.java

@@ -101,7 +101,7 @@ public enum DevCmdManager {
         DevCmdManager.registerDevCmd(new SetAdminRuneCmd());
         DevCmdManager.registerDevCmd(new SetInvulCmd());
         DevCmdManager.registerDevCmd(new MakeItemCmd());
-        DevCmdManager.registerDevCmd(new FillWarehouseCmd());
+        DevCmdManager.registerDevCmd(new FillCmd());
         DevCmdManager.registerDevCmd(new SetSubRaceCmd());
         // Admin