feat: add error traits and ATs #50

Job	Run time
check no_std	5s
docs	14s
doctest	31s
clippy	21s
feature-checks	27s
feature-propagation	47s
fmt	14s
wasm-unknown	19s
wasm-wasi	27s
test ubuntu-latest stable --no-default-features	32s
test ubuntu-latest stable	30s
test ubuntu-latest stable --all-features	29s
test ubuntu-latest nightly --no-default-features	23s
test ubuntu-latest nightly	35s
test ubuntu-latest nightly --all-features	32s
test ubuntu-latest 1.81 --no-default-features	34s
test ubuntu-latest 1.81	33s
test windows-latest stable --no-default-features	1m 43s
test windows-latest stable	1m 55s
test windows-latest stable --all-features	1m 16s
test windows-latest nightly --no-default-features	1m 10s
test windows-latest nightly	1m 7s
test windows-latest nightly --all-features	1m 6s
test windows-latest 1.81 --no-default-features	1m 4s
test windows-latest 1.81	1m 24s
deny / cargo deny check	15s
ci success	4s
	18m 37s

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