Added closing tabs with middle click (#2127)

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### Description

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Added handling middle mouse click for closing tab

### Related Issues
* closes #1986 
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### Checklist

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- [X] I read and understood the [contributing
guide](https://github.com/CodeEditApp/CodeEdit/blob/main/CONTRIBUTING.md)
as well as the [code of
conduct](https://github.com/CodeEditApp/CodeEdit/blob/main/CODE_OF_CONDUCT.md)
- [X] The issues this PR addresses are related to each other
- [X] My changes generate no new warnings
- [X] My code builds and runs on my machine
- [X] My changes are all related to the related issue above
- [X] I documented my code

### Screenshots

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Author: myaumura

CodeEdit/Features/Editor/TabBar/Tabs/Tab/EditorTabView.swift

@@ -46,6 +46,8 @@ struct EditorTabView: View {
     /// By default, this value is `false`. When the root view is appeared, it turns `true`.
     @State private var isAppeared: Bool = false
 
+    @State private var keyMonitor: Any?
+
     /// The id associating with the tab that is currently being dragged.
     ///
     /// When `nil`, then there is no tab being dragged.
@@ -193,6 +195,22 @@ struct EditorTabView: View {
                 }
             }
         }
+        .onAppear {
+            keyMonitor = NSEvent.addLocalMonitorForEvents(matching: .otherMouseDown) { event in
+                if self.isHovering && event.type == .otherMouseDown && event.buttonNumber == 2 {
+                    DispatchQueue.main.async {
+                        editor.closeTab(file: tabFile)
+                    }
+                }
+                return event
+            }
+        }
+        .onDisappear {
+            if let keyMonitor = keyMonitor {
+                NSEvent.removeMonitor(keyMonitor)
+                self.keyMonitor = nil
+            }
+        }
     }
 
     var body: some View {