[feat] set png compression/filter type through arguments

[EdenQwQ]

Implemented the ability to set png compression/filter type with -C and -F argument

pub enum CompressionType {
    Default,
    Fast,
    Best,
    Huffman,
    Rle,
}

pub enum FilterType {
    NoFilter,
    Sub,
    Up,
    Avg,
    Paeth,
    Adaptive,
}

[Shinyzenith]

Pr looks great! Is there anyway we can make this generic enough for all the backend formats ?

[EdenQwQ]

Pr looks great! Is there anyway we can make this generic enough for all the backend formats ?

Compression type and filter type are options only available for png format. We can add options for other formats by using a similar smart pointer

[Shinyzenith]

Pr looks great! Is there anyway we can make this generic enough for all the backend formats ?

Compression type and filter type are options only available for png format. We can add options for other formats by using a similar smart pointer

Ok I see, in that case, can we offload the compression to some other crate to do it for us which can support multiple formats?

If that's too big of a task right now, then it's just best to merge this for now :D

Also while we're on the topic, I added man-page generation in build.rs with scdoc, would you mind documenting this flag in the 1 and 7 sections of wayshot?

[Shinyzenith]

This is a really good PR and I wish to get this to production someday. I just need to find a good way to compress all supported formats.