Use NuGet for vcpkg binary cache

[huangminghuang]

Why

• CI and local developer builds should use the same vcpkg binary-cache setup so cache misses are easier to diagnose and reproduce.
• Developers should be able to run the cache-aware build once, then continue building from an IDE through CMake preset support without re-entering GitHub Packages/vcpkg environment details.
• vcpkg dependencies should be release-only by default to avoid rebuilding large third-party packages, while still allowing a Debug build of Wire Sysio itself.
• Fork PRs must avoid package credentials while still having a working vcpkg cache configuration.

Summary

• replace the local actions/cache-backed vcpkg binary cache with GitHub Packages NuGet cache
• add a shared scripts/build-with-github-vcpkg-cache.sh helper for CI/developer cache setup, CMake configure, build, optional tests, and developer CMakeUserPresets.json generation
• add CMake presets for GitHub-backed release builds, Debug-with-release-vcpkg-deps builds, trusted CI, and fork PR local-cache builds
• add an x64-linux-release vcpkg triplet so vcpkg packages build release-only by default
• update the reusable build workflow to call the shared helper in trusted CI or forked PR mode
• install Mono in the CI platform images so vcpkg can run NuGet on Linux
• disable vcpkg metrics in CI and grant package write permissions for trusted cache publishing

Validation

• parsed modified workflow YAML files with PyYAML
• validated scripts/build-with-github-vcpkg-cache.sh with bash -n
• validated CMake preset parsing with cmake --list-presets=all and cmake --preset ... -N
• smoke-tested generated developer user preset shape with dev-release / dev-debug
• checked invalid --jobs and conflicting --mode / --preset handling
• CI draft PR is intended to validate NuGet restore/publish behavior across platform images

Notes

• developer mode writes short IDE-friendly user presets: dev-release and dev-debug
• --build-dir is a build prefix in developer mode, but remains the exact artifact build directory in CI modes
• local Docker build acceleration is intentionally left for a follow-up PR so this change stays focused on CI vcpkg caching