feat: add rpc protocol, client and server #8

Job	Run time
cargo deny	32s
Android Build Only (aarch64-linux-android)	1m 6s
Checking docs	1m 28s
Checking fmt	26s
Android Build Only (armv7-linux-androideabi)	1m 7s
check_semver	22s
clippy_check	1m 35s
codespell	7s
Cross Build Only (x86_64-unknown-freebsd)	42s
Cross Test (i686-unknown-linux-gnu)	51s
Minimal Supported Rust Version	1m 22s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 8s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	1m 47s
CI Test Suite / Tests (ubuntu-latest, stable, none)	34s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 26s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 8s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	1m 11s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	1m 16s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	38s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	1m 24s
	20m 10s

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