Add support to convert PDF to and from other file formats

[likeadragonmaid]

The app should be able to do the following tasks in this issue:

1. Convert PDF to and from below given file formats.
2. Join group of images together in the given file formats.
3. Convert the below given file formats to PDF.
4. Extract images from the below given file formats.
5. Extract images from the below given file formats and archive them to zip.
6. Convert the PDF to set of images and archive them to zip.

.zip https://fileinfo.com/extension/zip

More information about file formats is also given, please refer to it.

.epub https://fileinfo.com/extension/epub .cbr https://fileinfo.com/extension/cbr .cbz https://fileinfo.com/extension/cbz .mobi https://fileinfo.com/extension/mobi .doc https://fileinfo.com/extension/doc .docx https://fileinfo.com/extension/docx .ppt https://fileinfo.com/extension/pptx .pptx https://fileinfo.com/extension/ppt .odt https://fileinfo.com/extension/odt

NOTE: Refrain from using .rar format since it is non-free.

Tip 1: CBZ is actually just a zip archive, to do the task you may need to rename the files in order i.e. 1.jpg, 2.jpg, 3.jpg, 4.jpg and so on, and the archive them to zip. After that finally you can just rename the file to [filename].zip to [filename].cbz .

Tip 2: CBR is just a rar archive if you find any evidence of it being non-free (since it's rar) please do comment, we can remove it from this issue.

[aishwaryavasu0509]

hey, I am interested in this can I help?

[shady2027]

I would like to work on this feature, can you assign it to me? Thank you!

[Universalizer]

.7z is also one of the 'best in class' in compression algorithm & file format & extremely fast speed for compression & decompression, License ; https://7-zip.org/license.txt

Just a suggestion.