CI: add `typos` job (#1734) #2983

Job	Run time
build (1.83.0, thumbv7em-none-eabi)	1m 10s
test (1.83.0)	32s
build (1.83.0, wasm32-unknown-unknown)	59s
test (stable)	26s
build (stable, thumbv7em-none-eabi)	1m 13s
test (nightly)	33s
build (stable, wasm32-unknown-unknown)	59s
minimal-versions	0s
	5m 52s

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