file endpoints("v1") to use query parameters

[bigcat88]

This is just the rebased #6376 PR.

Frontend Part: Comfy-Org/ComfyUI_frontend#2182

Changes Made:

• Added new file-related endpoints (getuserdata, post_userdata, delete_userdata, and move_userdata) to use query parameters instead of path parameters for file paths. This ensures compatibility with proxy-servers by avoiding reliance on URL path encoding.
• For the move_userdata endpoint, both the source and destination paths are now passed as query parameters (source and dest).

Notes:

• The Frontend must be updated to reflect these changes, as the file paths have been moved from path parameters to query parameters.
• Old endpoints were not touched, compatibility with old frontends will not be broken.

Resolves: #5629

Partially fixes problem from #4534

[StefanoBalocco]

Any news on this?

I stopped to use comfyui because of saves problem with a nginx reverse proxy, I would love to finally use it again.