feat!: add eip1559 estimator type #6036

Job	Run time
doctest	1m 27s
clippy	38s
check no_std	21s
feature-checks	3m 42s
wasm-unknown	52s
feature-propagation	51s
docs	1m 1s
wasm-wasi	1m 22s
fmt	11s
test ubuntu-latest stable --no-default-features	1m 45s
test ubuntu-latest stable	2m 2s
test ubuntu-latest stable --all-features	2m 54s
test ubuntu-latest nightly --no-default-features	1m 30s
test ubuntu-latest nightly	1m 31s
test ubuntu-latest nightly --all-features	2m 26s
test ubuntu-latest 1.81 --no-default-features	46s
test ubuntu-latest 1.81	1m 3s
test windows-latest stable --no-default-features	5m 51s
test windows-latest stable	3m 51s
test windows-latest stable --all-features	5m 21s
test windows-latest nightly --no-default-features	3m 33s
test windows-latest nightly	3m 25s
test windows-latest nightly --all-features	5m 46s
test windows-latest 1.81 --no-default-features	2m 18s
test windows-latest 1.81	2m 20s
deny / cargo deny check	18s
ci success	1s
	57m 6s

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