UI/AppKit: Add "Dump CSS Errors" menu item

Author: https://github.com/AtkinsSJ
Commit: 31536c53a2
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5576

UI/AppKit/Application/ApplicationDelegate.mm

@@ -657,6 +657,9 @@
     [submenu addItem:[[NSMenuItem alloc] initWithTitle:@"Dump All Resolved Styles"
                                                 action:@selector(dumpAllResolvedStyles:)
                                          keyEquivalent:@""]];
+    [submenu addItem:[[NSMenuItem alloc] initWithTitle:@"Dump CSS Errors"
+                                                action:@selector(dumpCSSErrors:)
+                                         keyEquivalent:@""]];
     [submenu addItem:[[NSMenuItem alloc] initWithTitle:@"Dump History"
                                                 action:@selector(dumpHistory:)
                                          keyEquivalent:@""]];

UI/AppKit/Interface/TabController.mm

@@ -370,6 +370,11 @@ static NSString* const TOOLBAR_TAB_OVERVIEW_IDENTIFIER = @"ToolbarTabOverviewIde
     [self debugRequest:"dump-all-resolved-styles" argument:""];
 }
 
+- (void)dumpCSSErrors:(id)sender
+{
+    [self debugRequest:"dump-all-css-errors" argument:""];
+}
+
 - (void)dumpHistory:(id)sender
 {
     [self debugRequest:"dump-session-history" argument:""];