feat(iroh-base, iroh-netcheck): intro netcheck as crate #11258

Job	Run time
Cross Build Only (x86_64-unknown-freebsd)	40s
Android Build Only (aarch64-linux-android)	1m 8s
check_semver	2m 24s
Checking fmt	31s
Android Build Only (armv7-linux-androideabi)	1m 6s
Cross Test (i686-unknown-linux-gnu)	48s
Build wasm32	1m 18s
cargo deny	31s
clippy_check	1m 21s
Checking docs	1m 15s
codespell	8s
Docker Test	52s
Minimal Supported Rust Version	1m 25s
CI Test Suite / Tests (ubuntu-latest, stable, all)	28s
CI Test Suite / Tests (ubuntu-latest, stable, none)	26s
CI Test Suite / Tests (ubuntu-latest, stable, default)	25s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	1m 22s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	33s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 22s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	30s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	1m 27s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	34s
netsim-integration-tests / Netsim	1m 4s
	21m 38s

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