Ladybird+LibWebView: Move options used to launch WebContent to a struct

It is currently a bit messy to pass these options along from main() to
where WebContent is actually launched. If a new flag were to be added,
there are a couple dozen files that need to be updated to pass that flag
along. With this change, the flag can just be added to the struct, set
in main(), and handled in launch_web_content_process().

Ladybird/AppKit/Application/ApplicationDelegate.mm

@@ -25,6 +25,7 @@
     // This will always be populated, but we cannot have a non-default constructible instance variable.
     Optional<WebView::CookieJar> m_cookie_jar;
 
+    Ladybird::WebContentOptions m_web_content_options;
     Optional<StringView> m_webdriver_content_ipc_path;
 
     Web::CSS::PreferredColorScheme m_preferred_color_scheme;
@@ -52,6 +53,7 @@
 - (instancetype)init:(Vector<URL>)initial_urls
               newTabPageURL:(URL)new_tab_page_url
               withCookieJar:(WebView::CookieJar)cookie_jar
+          webContentOptions:(Ladybird::WebContentOptions const&)web_content_options
     webdriverContentIPCPath:(StringView)webdriver_content_ipc_path
 {
     if (self = [super init]) {
@@ -75,6 +77,8 @@
 
         m_cookie_jar = move(cookie_jar);
 
+        m_web_content_options = web_content_options;
+
         if (!webdriver_content_ipc_path.is_empty()) {
             m_webdriver_content_ipc_path = webdriver_content_ipc_path;
         }
@@ -122,6 +126,11 @@
     return *m_cookie_jar;
 }
 
+- (Ladybird::WebContentOptions const&)webContentOptions
+{
+    return m_web_content_options;
+}
+
 - (Optional<StringView> const&)webdriverContentIPCPath
 {
     return m_webdriver_content_ipc_path;