[Feature] Allow json file import on category pages to manually match X bookmark folders

[ThoughtPhotography]

I have ~3K bookmarks and most are already in bookmark folders on X. The export script works fine on folders, but there doesn't seem to be a way to just create a category matching the X folder name and importing the json of that folder.

After running AI categorization (which took a while) they were all still 'uncategorized'.
(Using detected Codex CLI auth since Claude Code is macOS only)

Also, Edit only works for each individually so would take ages + the field is out of view. 🤷‍♂️
(Tested on both Firefox and Brave)

The end result is that neither AI or manual categorization are usable for me when my bookmarks are already organized in separate json files by category.

Even if AI categorization worked as expected some users would prefer to retain their existing organization from X.

Thanks!

P.S.
I used Claude to set things up and I'm guessing this hasn't been tested on Win as it added the following dependencies:

"@tailwindcss/oxide-win32-x64-msvc": "^4.2.1",     
"lightningcss": "^1.32.0",
"lightningcss-win32-x64-msvc": "^1.32.0",

If it's intended to remain Mac-only I can make local-only changes.