feat(protocol): Batch Error Types (#190) #681

Job	Run time
doctest	52s
test stable --no-default-features	54s
test stable	55s
test stable --all-features	1m 10s
clippy	47s
test nightly --no-default-features	1m 16s
feature-checks	1m 14s
fmt	14s
test nightly	1m 15s
test nightly --all-features	1m 35s
no-std	25s
test 1.81 --no-default-features	38s
wasm-unknown	27s
test 1.81	52s
wasm-wasi	26s
cfg-check	48s
docs	1m 6s
feature-powerset	2m 33s
	17m 27s

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