feat: add support for middle position in quick terminal

This update introduces the ability to launch the quick terminal
in the middle position.

Resolves #2494

macos/Sources/Features/QuickTerminal/QuickTerminalPosition.swift

@@ -5,6 +5,7 @@ enum QuickTerminalPosition : String {
     case bottom
     case left
     case right
+    case middle
 
     /// Set the loaded state for a window.
     func setLoaded(_ window: NSWindow) {
@@ -25,6 +26,14 @@ enum QuickTerminalPosition : String {
                     width: screen.frame.width / 4,
                     height: screen.frame.height)
             ), display: false)
+
+        case .middle:
+            window.setFrame(.init(
+                origin: window.frame.origin,
+                size: .init(
+                    width: screen.frame.width / 2,
+                    height: screen.frame.height / 3)
+            ), display: false)
         }
     }
 
@@ -61,6 +70,10 @@ enum QuickTerminalPosition : String {
 
         case .left, .right:
             finalSize.height = screen.frame.height
+
+        case .middle:
+            finalSize.width = screen.frame.width / 2
+            finalSize.height = screen.frame.height / 3
         }
 
         return finalSize
@@ -80,6 +93,9 @@ enum QuickTerminalPosition : String {
 
         case .right:
             return .init(x: screen.frame.maxX, y: 0)
+
+        case .middle:
+            return .init(x: (screen.visibleFrame.maxX - window.frame.width) / 2, y: screen.visibleFrame.maxY - window.frame.width)
         }
     }
 
@@ -97,6 +113,9 @@ enum QuickTerminalPosition : String {
 
         case .right:
             return .init(x: screen.visibleFrame.maxX - window.frame.width, y: window.frame.origin.y)
+
+        case .middle:
+            return .init(x: (screen.visibleFrame.maxX - window.frame.width) / 2, y: (screen.visibleFrame.maxY - window.frame.height) / 2)
         }
     }
 }

src/config/Config.zig

@@ -5257,6 +5257,7 @@ pub const QuickTerminalPosition = enum {
     bottom,
     left,
     right,
+    middle,
 };
 
 /// See quick-terminal-screen