use `thiserror` to handle errors

[edgarriba]

for now errors are handle with anyhow -- this is good at application level but ideally we should create custom error types for lib development.

ideally use https://github.com/dtolnay/thiserror

[vcode11]

Hi @edgarriba I am interested in contributing to this project. How do I get started?

[edgarriba]

@vcode11 thanks for the interest ! if you feel comfortable with Rust and thiserror feel free to go for it

[vcode11]

I found your commit: https://github.com/kornia/kornia-rs/commit/d72fca813731e6359201e4f35bce9ffb1fb621df this seems to solve the problem? Any particular reason why you didn't merge this? Anything that is missing here that you would like to have?

[edgarriba]

lack of time to finally land this but feel free to take that diff resume the task. The only thing i was a bit concerned is that i couldn't figure out properly how to chain all the original errors for the integrated library a propagate properly to the high level applications.

[edgarriba]

implemented in main already