Exclude media/ (and maybe some other things) from crates.io package

[crumblingstatue]

With #218 merged, repo performance is improved, but it might also be desirable to make the crates.io package as lean as possible as well.

Right now, it contains a 2 MB media folder.

Cargo.toml has ways to control what is included in a package, see https://doc.rust-lang.org/cargo/reference/manifest.html#the-exclude-and-include-fields

[fluxxcode]

I think this breaks the readme on crates.io 🤔

[crumblingstatue]

Ah, that's true.
This is personally why I prefer hosting things like screenshots outside of the package.
The crate size might get out of hand eventually if there are too many screenshots, and changelog images added.
Maybe at least the changelog images could be excluded from the crate.

[fluxxcode]

I'm currently considering generally removing all images from the CHANGELOG.md file and keeping the file only plain text. Images can then be used in the GitHub release.
Then we could keep all images from the readme inside the package and exclude all other images from the examples.

I'm also not sure whether Crates.io can handle the GIT LFS images in the README. I don't think so. So it needs to be adjusted again anyway.

[crumblingstatue]

I'm also not sure whether Crates.io can handle the GIT LFS images in the README. I don't think so. So it needs to be adjusted again anyway.

Well, since the crates.io package is just an archive, it would work as long as the images are present in the archive, regardless of how they are version tracked.