lms

Implement SST scheme #313

Job	Run time
rustfmt	12s
msrv	3m 47s
check-for-todos	2s
clippy	16s
set-msrv	4s
bench	42s
cross (1.63, aarch64-unknown-linux-gnu, default)	8m 23s
demos (stable, default)	21s
build (1.63, thumbv7em-none-eabi)	1m 50s
test (1.63)	3m 57s
build (1.63, wasm32-unknown-unknown)	1m 57s
cross (stable, aarch64-unknown-linux-gnu, default)	6m 31s
build (stable, thumbv7em-none-eabi)	13s
test (stable)	2m 6s
build (stable, wasm32-unknown-unknown)	30s
	30m 51s

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