Ladybird: Add RequestServer process to optionally replace Qt Networking

LibTLS still can't access many parts of the web, so let's hide this
behind a flag (with all the plumbing that entails).

Hopefully this can encourage folks to improve LibTLS's algorithm support
:^).

Ladybird/HelperProcess.h

@@ -6,10 +6,11 @@
 
 #pragma once
 
+#include "Types.h"
 #include <AK/Error.h>
 #include <AK/Span.h>
 #include <AK/StringView.h>
-
+#include <LibProtocol/RequestClient.h>
 #include <LibWebView/ViewImplementation.h>
 #include <LibWebView/WebContentClient.h>
 
@@ -17,4 +18,7 @@ ErrorOr<NonnullRefPtr<WebView::WebContentClient>> launch_web_content_process(Web
     ReadonlySpan<String> candidate_web_content_paths,
     WebView::EnableCallgrindProfiling,
     WebView::IsLayoutTestMode,
-    WebView::UseJavaScriptBytecode);
+    WebView::UseJavaScriptBytecode,
+    UseLagomNetworking);
+
+ErrorOr<NonnullRefPtr<Protocol::RequestClient>> launch_request_server_process(ReadonlySpan<String> candidate_request_server_paths);