Add support for nxxm.

[nxxm](https://nxxm.github.io)

src/ftxui/dom/paragraph.cpp

@@ -0,0 +1,16 @@
+#include <sstream>
+#include "ftxui/dom/elements.hpp"
+
+namespace ftxui {
+
+Elements paragraph(std::wstring the_text) {
+  Elements output;
+  std::wstringstream ss(the_text);
+  std::wstring word;
+  while (std::getline(ss, word, L' ')) {
+    output.push_back(text(word + L' '));
+  }
+  return output;
+}
+
+}  // namespace ftxui