Zig: Build System Reworked

Zig's build system has been reworked to move all package management functionality from the compiler into a separate maker process, reducing the compiler executable size by 4% and allowing package management to be patched without rebuilding the compiler. This architectural change also enables safety checks and CPU-specific optimizations for networking and cryptography, while improving the build server protocol by keeping the maker process alive across configuration changes. Several follow-up tasks remain before the Zig 0.17.0 release, including implementing the build server protocol MVP and enabling build script change detection.