The get-files action incorrectly attaches directories in addition to files.

For example, under Linux, in the case of a tree like below:

my_temp/    
  │  
  ├── file1.txt  
  ├── file2.txt  
  ├── file3.txt  
  ├── folder1/  
  │   ├── file1.txt  
  │   ├── picture.png  
  │   └── titi.csv  
  ├── folders2/  
  │   ├── file1.txt  
  │   └── subfolder22/  
  │       ├── file2.txt  
  │       ├── picture.png  
  │       └── toto.csv  
  ├── folders3/  
  │   ├── file1.txt  
  │   └── subfolders33/  
  │       ├── file2.txt  
  │       └── subfolder333/  
  │           ├── file3.txt  
  │           ├── picture.png  
  │           ├── tata.csv  
  │           ├── titi.csv  
  │           ├── toto.csv  
  │           └── tutu.csv  
  ├── folders4/  
  │   ├── picture_not_selected.png  
  │   └── subfolders44/  
  │       ├── picture.jpg  
  │       └── subfolders444/  
  │           ├── picture.jpeg  
  │           └── subfolder4444/  
  │               └── picture.png  
  ├── folders5/  
  │   └── subfolder55_empty  
  └── tata.csv  

With the '**/*' pattern, the list of attached objects is as follows:

['::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/.\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders2\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders2/subfolder22\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders2/subfolder22/toto.csv\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders2/subfolder22/file2.txt\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders2/subfolder22/picture.png\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders2/file1.txt\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folder1\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folder1/titi.csv\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folder1/file1.txt\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folder1/picture.png\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders5\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders5/subfolder55_empty\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./tata.csv\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./file1.txt\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./file2.txt\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/subfolders33\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/subfolders33/file2.txt\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/subfolders33/subfolder333\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/subfolders33/subfolder333/toto.csv\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/subfolders33/subfolder333/tutu.csv\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/subfolders33/subfolder333/tata.csv\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/subfolders33/subfolder333/titi.csv\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/subfolders33/subfolder333/picture.png\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/subfolders33/subfolder333/file3.txt\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders3/file1.txt\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders4\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders4/picture_not_selected.png\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders4/subfolders44\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders4/subfolders44/picture.jpg\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders4/subfolders44/subfolders444\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders4/subfolders44/subfolders444/picture.jpeg\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders4/subfolders44/subfolders444/subfolder4444\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./folders4/subfolders44/subfolders444/subfolder4444/picture.png\n',  
 '::attach::/home/squashtf/21ddf187-a3cb-4f94-9ad5-5fdc213f8ef4/my_temp/./file3.txt\n']  

We should attach only the files.

To check also under Windows?