[IGNORE ME]fix(docs): add hwloc and pkg-config installation prerequisites by OS

[Standing-Man]

Which issue does this PR close?

Closes #

Rationale

Local builds are prone to failure due to undocumented prerequisites: hwlocality depends on system hwloc, and detection relies on pkg-config/pkgconf, which are not currently documented in CONTRIBUTING.md.

What changed?

Updated CONTRIBUTING.md by adding a new System Dependencies section under Run It Locally that:

• Explains the server crates depend on hwlocality (hwloc bindings).
• Clarifies non-musl targets need system hwloc dev packages before build.
• Adds OS-specific install commands:
  • Ubuntu/Debian: libhwloc-dev pkg-config
  • Fedora/RHEL/CentOS: hwloc-devel pkgconf-pkg-config
  • Arch: hwloc pkgconf
  • macOS (Homebrew): hwloc pkg-config
• Notes musl targets use vendored hwlocality support in this repo.

Local Execution

• Passed / not passed
  Passed
• Pre-commit hooks ran / not ran
  Ran

AI Usage

[Standing-Man]

Hi @hubcio and @spetz - Please review at your convinience.

[Standing-Man]

Hi, Please hold off on merging this PR for now. I think CONTRIBUTING.md still needs to include instructions on installing system dependencies and crates, among other details. Thanks!

[github-actions]

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