Ladybird: Implement a JavaScript console for the AppKit chrome

This adds menu items to open an interactive JavaScript console for a web
page. This more or less mimics the Qt implementation of the console.
Hooks are included to tie the lifetime of the console window with the
tab it belongs to; if the tab is closed, the console window is closed.

Ladybird/AppKit/UI/ConsoleController.mm

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#import <UI/Console.h>
+#import <UI/ConsoleController.h>
+#import <UI/LadybirdWebView.h>
+#import <UI/Tab.h>
+
+#if !__has_feature(objc_arc)
+#    error "This project requires ARC"
+#endif
+
+@interface ConsoleController () <NSWindowDelegate>
+
+@property (nonatomic, strong) Tab* tab;
+
+@end
+
+@implementation ConsoleController
+
+- (instancetype)init:(Tab*)tab
+{
+    if (self = [super init]) {
+        self.tab = tab;
+    }
+
+    return self;
+}
+
+#pragma mark - Private methods
+
+- (Console*)console
+{
+    return (Console*)[self window];
+}
+
+#pragma mark - NSWindowController
+
+- (IBAction)showWindow:(id)sender
+{
+    self.window = [[Console alloc] init:self.tab];
+    [self.window setDelegate:self];
+    [self.window makeKeyAndOrderFront:sender];
+}
+
+#pragma mark - NSWindowDelegate
+
+- (void)windowWillClose:(NSNotification*)notification
+{
+    [self.tab onConsoleClosed];
+}
+
+- (void)windowDidResize:(NSNotification*)notification
+{
+    if (![[self window] inLiveResize]) {
+        [[[self console] web_view] handleResize];
+    }
+}
+
+@end