Use Error types instead of String

[bobbens]

The rust sdl2 bindings use String everywhere for errors, which makes it play poorly with anyhow and similar crates. This wasn't done in the sdl2 crate because it was a breaking change. Since sdl3 is a breaking change itself, it may be worth doing something in this direction.

Could be as easy as a tuple struct SdlError(String) that implements Error as mentioned in the PR below.

For reference:

• sdl2 Error types issue
• sdl2 Error types pull request

[revmischa]

Okay, why not

[eidloi]

this is also needed to build in no_std targets such as aarch64-nintendo-switch-freestanding

[revmischa]

added in 0.13.0