feat(platform): introduce abstractions for cross-platform interface statistics and traffic control

Decouple the rate controller from Linux-specific Netlink calls to support other operating systems. This adds a macOS backend for interface statistics and an "observe-only" mode for platforms where traffic shaping is not yet implemented.

Cargo.toml

@@ -21,8 +21,6 @@ strip = "symbols"
 [dependencies]
 anyhow = "1.0"
 icmp-socket2 = "0.4.2"
-netlink-bindings = { git = "https://github.com/one-d-wide/netlink-bindings.git", rev = "0b609e9380610e7da73f8c43cdf804a1d1bf5474", features = ["rt-link", "tc"] }
-netlink-socket2 = { git = "https://github.com/one-d-wide/netlink-bindings.git", rev = "0b609e9380610e7da73f8c43cdf804a1d1bf5474" }
 fastrand = "2"
 rustix = { version = "1.1", features = ["fs", "system", "thread", "time"] }
 thiserror = "2.0"
@@ -34,6 +32,8 @@ features = ["std"]
 version = "0.4"
 
 [target.'cfg(target_os = "linux")'.dependencies]
+netlink-bindings = { git = "https://github.com/one-d-wide/netlink-bindings.git", rev = "0b609e9380610e7da73f8c43cdf804a1d1bf5474", features = ["rt-link", "tc"] }
+netlink-socket2 = { git = "https://github.com/one-d-wide/netlink-bindings.git", rev = "0b609e9380610e7da73f8c43cdf804a1d1bf5474" }
 rust-uci = { git = "https://github.com/namib-project/rust-uci.git", rev = "3e7b6153b6df92b45428c32bb6461756563deecb", optional = true }
 
 [features]