Add base files

src/main/java/com/university/chat/Client/TransferProgress.java

@@ -0,0 +1,37 @@
+package com.university.chat.Client;
+
+public class TransferProgress {
+
+    private final long total;
+    private final long startTime;
+    private static final int WIDTH = 30;
+
+    public TransferProgress(long total) {
+        this.total = total;
+        this.startTime = System.currentTimeMillis();
+    }
+
+    public void update(long current) {
+
+        double percent = (double) current / total;
+        int filled = (int) (percent * WIDTH);
+
+        StringBuilder bar = new StringBuilder("[");
+        for (int i = 0; i < WIDTH; i++) {
+            bar.append(i < filled ? "█" : " ");
+        }
+        bar.append("]");
+
+        long elapsed = System.currentTimeMillis() - startTime;
+        double speed = current / 1024.0 / 1024.0 / (elapsed / 1000.0 + 0.001);
+
+        System.out.printf("\r%s %3d%% | %.2f MB/s",
+                bar,
+                (int) (percent * 100),
+                speed);
+
+        if (current >= total) {
+            System.out.println();
+        }
+    }
+}