Modify terminal tab bar location in titlebar

@@ -55,9 +55,9 @@

        // Some setup needs to happen BEFORE it is added, such as layout. If
        // we don't do this before the call below, we'll trigger an AppKit
        // assertion.
        childViewController.layoutAttribute = .right
        childViewController.layoutAttribute = .top

        super.addTitlebarAccessoryViewController(childViewController)

        // Setup the tab bar to go into the titlebar.

@@ -117,65 +117,8 @@
        // View model updates must happen on their own ticks.
        DispatchQueue.main.async {
            self.viewModel.hasTabBar = true
        }

        // Find our clip view
        guard let clipView = tabBar.firstSuperview(withClassName: "NSTitlebarAccessoryClipView") else { return }
        guard let accessoryView = clipView.subviews[safe: 0] else { return }
        guard let titlebarView = clipView.firstSuperview(withClassName: "NSTitlebarView") else { return }
        guard let toolbarView = titlebarView.firstDescendant(withClassName: "NSToolbarView") else { return }

        // The container is the view that we'll constrain our tab bar within.
        let container = toolbarView

        // The padding for the tab bar. If we're showing window buttons then
        // we need to offset the window buttons.
        let leftPadding: CGFloat = switch(self.derivedConfig.macosWindowButtons) {
        case .hidden: 0
        case .visible: 70
        }

        // Constrain the accessory clip view (the parent of the accessory view
        // usually that clips the children) to the container view.
        clipView.translatesAutoresizingMaskIntoConstraints = false
        accessoryView.translatesAutoresizingMaskIntoConstraints = false

        // Setup all our constraints
        NSLayoutConstraint.activate([
            clipView.leftAnchor.constraint(equalTo: container.leftAnchor, constant: leftPadding),
            clipView.rightAnchor.constraint(equalTo: container.rightAnchor),
            clipView.topAnchor.constraint(equalTo: container.topAnchor, constant: 2),
            clipView.heightAnchor.constraint(equalTo: container.heightAnchor),
            accessoryView.leftAnchor.constraint(equalTo: clipView.leftAnchor),
            accessoryView.rightAnchor.constraint(equalTo: clipView.rightAnchor),
            accessoryView.topAnchor.constraint(equalTo: clipView.topAnchor),
            accessoryView.heightAnchor.constraint(equalTo: clipView.heightAnchor),
        ])

        clipView.needsLayout = true
        accessoryView.needsLayout = true

        // Setup an observer for the NSTabBar frame. When system appearance changes or
        // other events occur, the tab bar can resize and clear our constraints. When this
        // happens, we need to remove our custom constraints and re-apply them once the
        // tab bar has proper dimensions again to avoid constraint conflicts.
        tabBar.postsFrameChangedNotifications = true
        tabBarObserver = NotificationCenter.default.addObserver(
            forName: NSView.frameDidChangeNotification,
            object: tabBar,
            queue: .main
        ) { [weak self] _ in
            guard let self else { return }

            // Remove the observer so we can call setup again.
            self.tabBarObserver = nil

            // Wait a tick to let the new tab bars appear and then set them up.
            DispatchQueue.main.async {
                self.setupTabBar()
            }
        }
    }

    func removeTabBar() {
        // View model needs to be updated on another tick because it