add client handler file and code

client_handler.c

@@ -0,0 +1,16 @@
+#include "client_handler.h"
+
+#define BUFFER_SIZE 1024
+
+void* client_handler(void* args) {
+    int client = *((int*)args);
+    char* buffer = (char*)malloc(BUFFER_SIZE);
+
+    ssize_t bytes_read = recv(client, buffer, BUFFER_SIZE, 0);
+    if (bytes_read > 0) {
+        buffer[bytes_read] = '\0';
+        printf("Received: %s\n", buffer);
+    }
+    free(buffer);
+    return NULL;
+}