feat: add OpPooledTransaction #1165

Job	Run time
cfg-check	58s
docs	1m 14s
clippy	1m 19s
doctest	56s
examples	1m 5s
feature-checks	3m 43s
feature-powerset	4m 52s
fmt	14s
no-std	45s
wasm-unknown	1m 16s
test stable --no-default-features	59s
wasm-wasi	1m 11s
test stable	1m 19s
test stable --all-features	1m 40s
test nightly --no-default-features	1m 31s
test nightly	1m 36s
test nightly --all-features	2m 32s
test 1.81 --no-default-features	44s
test 1.81	46s
	28m 40s

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