enhance: 新增app时，不再需要更改run.sh即可完成文件拷贝

run.sh

@@ -100,8 +100,8 @@ if [ "${GENERATE_ISO}" == "1" ]; then
     bash mount_virt_disk.sh || exit 1
     mkdir -p ${boot_folder}/grub
     cp ${kernel} ${root_folder}/bin/disk_mount/boot
-    cp ${root_folder}/bin/user/shell.elf ${root_folder}/bin/disk_mount
-    cp ${root_folder}/bin/user/about.elf ${root_folder}/bin/disk_mount
+    # 拷贝用户程序到磁盘镜像
+    cp -r ${root_folder}/bin/user/* ${root_folder}/bin/disk_mount
     mkdir -p ${root_folder}/bin/disk_mount/dev
     touch ${root_folder}/bin/disk_mount/dev/keyboard.dev