Unwrap crossterm::Result<T, ErrorKind> to std::io::Result.

[gibbz00]

Introducing superficially wrapped Error types increases in most cases error handling complexity, both internally and externally.

https://github.com/fdehau/tui-rs/blob/fafad6c96109610825aad89c4bba5253e01101ed/src/backend/crossterm.rs#L125-L127

Generally, it becomes a nuisance every time one is working inside a function that returns a Result<T, io::Error>. Any expression that returns a crossterm::Result leads to a mismatched type compile time error, even if the errors are practically the same.

Unwrapping the type should also increase the transparency of the error origin.

[TimonPost]

Agree in the past we had some custom errors but as crossterm is close to io operations it should likely reflect that.

[TimonPost]

The code is not compiling