feat(iroh): allow custom protocols with optional manual accept #8189

Job	Run time
check_semver	4m 31s
Checking fmt	14s
Checking docs	1m 5s
clippy_check	1m 29s
Cross compile (i686-unknown-linux-gnu)	2m 33s
Cross compile (armv7-linux-androideabi)	59s
Cross compile (aarch64-linux-android)	56s
cargo deny	30s
Minimal Supported Rust Version	1m 43s
Run network simulations/benchmarks	8m 4s
CI Test Suite / Tests (ubuntu-latest, stable, all)	2m 27s
CI Test Suite / Tests (ubuntu-latest, stable, none)	2m 9s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	3m 54s
CI Test Suite / Tests (ubuntu-latest, stable, default)	2m 16s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	3m 50s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	3m 4s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	3m 44s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	2m 52s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	2m 54s
	49m 14s

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