too much stuff included in the package

https://github.com/mitchellh/libxev/blob/4e6781895e4e6c477597c8c2713d36cd82b57d07/build.zig.zon#L3

my guesses:

```
yes:
README.md
build.zig
build.zig.zon
LICENSE
src/

no:
shell.nix
.envrc
flake.nix
docs/
nix/
.gitignore
include/
examples/
.github/
website/
flake.lock
```