I have a folder "./by_date/" with files named like "2023-02-12.json", "2023-02-13.json", "2023-02-14.json"... structured as follows:

[
{
    "id": "c6fd",
    "journal": "Journal A",
    "title": "Title 1",
    "description": "Description for article 1",
    "url": "https://www.foo.bar/001",
    "tags_from_site": "Tag1, Tag2, Tag3"
},
{
    "id": "59a4",
    "journal": "Journal A",
    "title": "Title 2",
    "description": "Description for article 2",
    "url": "https://www.foo.bar/002",
    "tags_from_site": "Tag4, Tag2, Tag5"
},
{
    "id": "94df",
    "journal": "Journal B",
    "title": "Title 3",
    "description": "Description for article 3",
    "url": "https://www.bar.foo/003",
    "tags_from_site": "Tag1, Tag8, Tag9"
}   
]

I want to browse all the files in the folder "./by_date/" and for each file, I want to create a new file in the folder "./tags/" with the same name but without the ".json". In this file, I just want a sorted list of the tags in the form of a plaintext file:

Tag1
Tag2
Tag3
Tag4
Tag5
Tag8
Tag9