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.cpp

@@ -0,0 +1,72 @@
+#include <cstdint>  // for uint8_t
+#include <memory>   // for make_shared
+#include <string>   // for string
+#include <utility>  // for move
+
+#include "ftxui/dom/elements.hpp"        // for Element, Decorator, hyperlink
+#include "ftxui/dom/node_decorator.hpp"  // for NodeDecorator
+#include "ftxui/screen/box.hpp"          // for Box
+#include "ftxui/screen/screen.hpp"       // for Screen, Pixel
+
+namespace ftxui {
+
+class Hyperlink : public NodeDecorator {
+ public:
+  Hyperlink(Element child, std::string link)
+      : NodeDecorator(std::move(child)), link_(link) {}
+
+  void Render(Screen& screen) override {
+    uint8_t hyperlink_id = screen.RegisterHyperlink(link_);
+    for (int y = box_.y_min; y <= box_.y_max; ++y) {
+      for (int x = box_.x_min; x <= box_.x_max; ++x) {
+        screen.PixelAt(x, y).hyperlink = hyperlink_id;
+      }
+    }
+    NodeDecorator::Render(screen);
+  }
+
+  std::string link_;
+};
+
+/// @brief Make the rendered area clickable using a web browser.
+///        The link will be opened when the user click on it.
+///        This is supported only on a limited set of terminal emulator.
+///        List: https://github.com/Alhadis/OSC8-Adoption/
+/// @param link The link
+/// @param child The input element.
+/// @return The output element with the link.
+/// @ingroup dom
+///
+/// ### Example
+///
+/// ```cpp
+/// Element document =
+///   hyperlink("https://github.com/ArthurSonzogni/FTXUI", "link");
+/// ```
+Element hyperlink(std::string link, Element child) {
+  return std::make_shared<Hyperlink>(std::move(child), link);
+}
+
+/// @brief Decorate using an hyperlink.
+///        The link will be opened when the user click on it.
+///        This is supported only on a limited set of terminal emulator.
+///        List: https://github.com/Alhadis/OSC8-Adoption/
+/// @param link The link to redirect the users to.
+/// @return The Decorator applying the hyperlink.
+/// @ingroup dom
+///
+/// ### Example
+///
+/// ```cpp
+/// Element document =
+///   text("red") | hyperlink("https://github.com/Arthursonzogni/FTXUI");
+/// ```
+Decorator hyperlink(std::string link) {
+  return [link](Element child) { return hyperlink(link, std::move(child)); };
+}
+
+}  // 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.

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.