Stop using Sender/Receiver in TerminalInputParser. (#1073)

Stop using Sender/Receiver in TerminalInputParser.

This will help removing usage of thread.

At some point, my goal is to have an initialization step when installing
the ScreenInteractive so that we can provide the terminal ID
synchronously without losing some events. This will help with:
https://github.com/ArthurSonzogni/FTXUI/pull/1069

src/ftxui/component/screen_interactive_test.cpp

@@ -27,9 +27,9 @@ namespace {
 // Capture the standard output (stdout) to a string.
 class StdCapture {
  public:
-  explicit StdCapture(std::string* captured)
-      : captured_(captured) {
-    if (pipe(pipefd_) != 0) return;
+  explicit StdCapture(std::string* captured) : captured_(captured) {
+    if (pipe(pipefd_) != 0)
+      return;
     old_stdout_ = dup(fileno(stdout));
     fflush(stdout);
     dup2(pipefd_[1], fileno(stdout));
@@ -188,9 +188,7 @@ TEST(ScreenInteractive, FixedSizeInitialFrame) {
     auto capture = StdCapture(&output);
 
     auto screen = ScreenInteractive::FixedSize(2, 2);
-    auto component = Renderer([&] {
-      return text("AB");
-    });
+    auto component = Renderer([&] { return text("AB"); });
 
     Loop loop(&screen, component);
     loop.RunOnce();
@@ -241,7 +239,6 @@ TEST(ScreenInteractive, FixedSizeInitialFrame) {
       "\r\n"sv;
   ASSERT_EQ(expected, output);
 #endif
-
 }
 
 }  // namespace ftxui