sloproxy

chore(build): update dependencies, enhance cross-compilation, and refactor workflows master

- Updated `golang.org/x/sys` to v0.38.0 in `go.mod` and replaced `syscall` with `windows` package for memory allocation in `loader_windows.go`. - Improved cross-compilation in `.goreleaser.yml` using Zig-based toolchains for better platform support. - Changed GitHub Actions workflow to use macOS runners and added Zig toolchain setup.


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