Refactor Rust error handling

[kylebarron]

The Rust-side error handling of this crate is pretty bad because it's a mish-mosh of some error handling brought in from the tiff crate plus new error enums we defined ourselves.

I don't think we'll include this in our next release, but it would be nice to handle for 0.3.

[weiji14]

Some useful advice in this blog post - https://fast.github.io/blog/stop-forwarding-errors-start-designing-them/, may be useful to help propagate errors from dependency crates (e.g object_store, jpeg2k, etc).