Added sample for smooth block progress bar

samples/block_progress_bar.cpp

@@ -0,0 +1,32 @@
+#include <indicators/block_progress_bar.hpp>
+#include <thread>
+#include <chrono>
+
+int main() {
+
+  // Hide cursor
+  std::cout << "\e[?25l";
+  
+  indicators::BlockProgressBar bar;
+  
+  // Configure the bar
+  bar.set_bar_width(80);
+  bar.start_bar_with("[");
+  bar.end_bar_with("]");
+  bar.set_foreground_color(indicators::Color::WHITE); 
+  
+  // Update bar state
+  auto progress = 0.0f;
+  while (true) {
+    bar.set_progress(progress);
+    progress += 0.25f;
+    if (bar.is_completed())
+      break;
+    std::this_thread::sleep_for(std::chrono::milliseconds(50));
+  }
+
+  // Show cursor
+  std::cout << "\e[?25h";  
+
+  return 0;
+}