refactor: remove build.rs and runtime resource copying at build time

[qaqland]

Ref 65ffea7

[philocalyst]

Sorry, why do you think we should remove this entirely? Pretty good fallback at pretty low cost imo @qaqland

[qaqland]

Usually, build.rs are meant to help with compilation only and shouldn't touch user configuration directories.

OUT_DIR — If the package has a build script, this is set to the folder where the build script should place its output. See below for more information. (Only set during compilation.) Cargo does not guarantee that this directory is empty, and it is not cleaned between builds.
https://doc.rust-lang.org/cargo/reference/environment-variables.html

[philocalyst]

Thanks for the clarification, just didn't know the intent here. We'll make sure this is handled on the packaging side.

[philocalyst]

LGTM