refactor: Move `iroh-router` into `iroh-net` and rename `iroh-net` to `iroh` #11483

Job	Run time
Checking docs	1m 10s
Android Build Only (aarch64-linux-android)	1m 6s
cargo deny	30s
Android Build Only (armv7-linux-androideabi)	1m 7s
Checking fmt	25s
check_semver	2m 7s
codespell	4s
clippy_check	1m 59s
Cross Build Only (x86_64-unknown-freebsd)	48s
Minimal Supported Rust Version	1m 19s
Cross Test (i686-unknown-linux-gnu)	2m 19s
Build wasm32	32s
netsim-integration-tests / Netsim	6m 0s
CI Test Suite / Tests (ubuntu-latest, stable, all)	2m 25s
CI Test Suite / Tests (ubuntu-latest, stable, none)	2m 7s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 56s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	2m 30s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	2m 31s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	2m 1s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	2m 25s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	2m 12s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	2m 30s
	40m 3s

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