feat: 添加进度条，完善文档和提示语，国际化

main.py

@@ -1,12 +1,15 @@
-from sbackup import run
-
-
-def main():
-    try:
-        run()
-    except KeyboardInterrupt:
-        print("\nExit.")
-
-
-if __name__ == "__main__":
-    main()
+from sbackup import run
+from sbackup.i18n import t
+
+
+def main() -> None:
+    """主函数入口"""
+    try:
+        run()
+    except KeyboardInterrupt:
+        print(t("exit.message"))
+
+
+if __name__ == "__main__":
+    main()
+