add a .djvu converter and other features to bentopdf

[VikReznov]

I have recently learned about the existence of .djvu formats and they seem quite good and more efficient than .pdf compression.

I was not able to find .djvu file features in bentopdf.

Even though I know bentpdf is supposed to be for .pdf files hence the name, I think it could be a good idea to add a .djvu converter and other features related to it ?

[alam00000]

Yes im working on it

[VikReznov]

oh alright good luck then !