initial release: Rust port of MasterHttpRelayVPN apps_script mode #1

Job	Run time
build (x86_64-apple-darwin, macos-latest, mhrv-rs-macos-amd64)	2m 16s
build (aarch64-apple-darwin, macos-latest, mhrv-rs-macos-arm64)	2m 2s
build (x86_64-unknown-linux-gnu, ubuntu-latest, mhrv-rs-linux-amd64)	1m 41s
build (x86_64-pc-windows-gnu, windows-latest, mhrv-rs-windows-amd64)	4m 30s
build (aarch64-unknown-linux-gnu, ubuntu-latest, mhrv-rs-linux-arm64)	2m 13s
release	13s
	12m 55s

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