RPC implementation + FFI #1363

Job	Run time
Build (x86_64-pc-windows-msvc)	6m 16s
Build (aarch64-pc-windows-msvc)	7m 6s
Build (x86_64-apple-darwin)	5m 28s
Build (aarch64-apple-darwin)	6m 3s
Build (aarch64-apple-ios)	8m 31s
Build (aarch64-apple-ios-sim)	5m 48s
Build (x86_64-unknown-linux-gnu)	4m 7s
Build (aarch64-unknown-linux-gnu)	6m 30s
Build (aarch64-linux-android)	3m 45s
Build (armv7-linux-androideabi)	3m 49s
Build (x86_64-linux-android)	3m 46s
	1h 1m 9s

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