feat(iroh-net): add Endpoint::watch_node_addr #10387

Job	Run time
Android Build Only (aarch64-linux-android)	1m 23s
cargo deny	31s
Checking docs	1m 23s
Android Build Only (armv7-linux-androideabi)	1m 21s
Checking fmt	10s
check_semver	5m 21s
clippy_check	2m 31s
codespell	8s
Cross Build Only (x86_64-unknown-freebsd)	1m 10s
Cross Test (i686-unknown-linux-gnu)	3m 34s
Docker Test	2m 8s
Minimal Supported Rust Version	1m 26s
Run network simulations/benchmarks	8m 0s
Build wasm32	29s
CI Test Suite / Tests (ubuntu-latest, stable, all)	4m 10s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	4m 7s
CI Test Suite / Tests (ubuntu-latest, stable, none)	3m 21s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	4m 14s
CI Test Suite / Tests (ubuntu-latest, stable, default)	3m 28s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	4m 6s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	4m 53s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	4m 14s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	3m 54s
	1h 6m 2s

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