Add the !item debug command to give items by name

Compared to the //gm item command which only accepts IDs.

Fixes #50

USAGE.md

@@ -114,6 +114,7 @@ These special debug commands start with `!` and are custom to Kawari.
 * `!festival <id1> <id2> <id3> <id4>`: Sets the festival in the current zone. Multiple festivals can be set together to create interesting effects.
 * `!reload`: Reloads `Global.lua` that is normally only loaded once at start-up.
 * `!finishevent`: Forcefully finishes the current event, useful if the script has an error and you're stuck talking to something.
+* `!item <name>`: Gives you an item matching by name.
 
 ### GM commands
 

src/world/chat_handler.rs

@@ -1,5 +1,5 @@
 use crate::{
-    inventory::Storage,
+    inventory::{Item, Storage},
     ipc::zone::{ChatMessage, GameMasterRank},
     world::ToServer,
 };
@@ -78,6 +78,23 @@ impl ChatHandler {
                 connection.send_inventory(true).await;
                 true
             }
+            "!item" => {
+                let (_, name) = chat_message.message.split_once(' ').unwrap();
+
+                {
+                    let mut gamedata = connection.gamedata.lock().unwrap();
+
+                    if let Some((_, id)) = gamedata.get_item_by_name(name) {
+                        connection
+                            .player_data
+                            .inventory
+                            .add_in_next_free_slot(Item { quantity: 1, id });
+                    }
+                }
+
+                connection.send_inventory(false).await;
+                true
+            }
             "!reload" => {
                 connection.reload_scripts();
                 connection.send_message("Scripts reloaded!").await;