Feature: hyperlink support. (#665)

See the [OSC 8 page](https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda).
FTXUI support proposed by @aaleino in [#662](https://github.com/ArthurSonzogni/FTXUI/issues/662).

API:
```cpp
auto link = text("Click here") | hyperlink("https://github.com/FTXUI")
```

Fixed:https://github.com/ArthurSonzogni/FTXUI/issues/662

src/ftxui/dom/hyperlink_test.cpp

@@ -0,0 +1,43 @@
+#include <gtest/gtest.h>  // for Test, EXPECT_EQ, Message, TestPartResult, TestInfo (ptr only), TEST
+#include <string>  // for allocator, string
+
+#include "ftxui/dom/elements.hpp"  // for text, hyperlink, operator|, Element, hbox
+#include "ftxui/dom/node.hpp"      // for Render
+#include "ftxui/screen/screen.hpp"  // for Screen, Pixel
+
+namespace ftxui {
+
+TEST(HyperlinkTest, Basic) {
+  auto element = hbox({
+      text("text 1") | hyperlink("https://a.com"),
+      text("text 2") | hyperlink("https://b.com"),
+      text("text 3"),
+      text("text 4") | hyperlink("https://c.com"),
+  });
+
+  Screen screen(6 * 4, 1);
+  Render(screen, element);
+
+  EXPECT_EQ(screen.PixelAt(0, 0).hyperlink, 1u);
+  EXPECT_EQ(screen.PixelAt(5, 0).hyperlink, 1u);
+  EXPECT_EQ(screen.PixelAt(6, 0).hyperlink, 2u);
+  EXPECT_EQ(screen.PixelAt(11, 0).hyperlink, 2u);
+
+  std::string output = screen.ToString();
+  EXPECT_EQ(output,
+            "\x1B]8;;https://a.com\x1B\\"
+            "text 1"
+            "\x1B]8;;https://b.com\x1B\\"
+            "text 2"
+            "\x1B]8;;\x1B\\"
+            "text 3"
+            "\x1B]8;;https://c.com\x1B\\"
+            "text 4"
+            "\x1B]8;;\x1B\\");
+}
+
+}  // namespace ftxui
+
+// Copyright 2023 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.