refactor: rename error type and variants #8

Job	Run time
rustfmt	12s
test (pinned, ubuntu-latest, 1.74.0)	53s
test (stable, ubuntu-latest, stable)	53s
test (beta, ubuntu-latest, beta)	51s
test (nightly, ubuntu-latest, nightly)	52s
test (stable-musl, ubuntu-latest, stable, x86_64-unknown-linux-musl)	1m 27s
test (stable-x86, ubuntu-latest, stable, i686-unknown-linux-gnu)	1m 27s
test (stable-aarch64, ubuntu-latest, stable, aarch64-unknown-linux-gnu)	1m 9s
test (stable-arm-gnueabihf, ubuntu-latest, stable, armv7-unknown-linux-gnueabihf)	1m 15s
test (stable-arm-musleabihf, ubuntu-latest, stable, armv7-unknown-linux-musleabihf)	1m 26s
test (stable-arm-musleabi, ubuntu-latest, stable, armv7-unknown-linux-musleabi)	1m 16s
test (stable-powerpc64, ubuntu-latest, stable, powerpc64-unknown-linux-gnu)	1m 11s
test (stable-s390x, ubuntu-latest, stable, s390x-unknown-linux-gnu)	1m 10s
test (macos, macos-latest, nightly)	1m 49s
	15m 51s

Provide feedback