Feature request: temp file cleanup

[ooofest]

Hello,
The new memory management, working on smaller portions of the overall frame count at a time, has been very effective for me - thank you!

I did notice that my Temp directory was getting rather large recently, as it affected swap file size expansion, and it appears that Refacer is writing temporary files to a "gradio" folder in the Windows TEMP folder for videos upon which it works. I manually cleaned up gigabytes of files after discovering this, so wondered if Refacer might clear its temp folder upon startup as a consideration.