feat: Lists and extension sets with splicing #2614

Job	Run time
Check for changes	3s
Check for changes	3s
Build benchmarks 🏋️	45m 59s
Build benchmarks 🏋️	2m 3s
tests (Rust 1.75)	45m 58s
tests (Rust 1.75)	2m 17s
tests (Rust nightly, coverage)	1m 52s
tests (Rust nightly, coverage)	1m 52s
tests (Rust beta)	2m 56s
tests (Rust beta)	2m 56s
check	1m 18s
check	1m 18s
tests (Rust stable, all features)	1m 37s
tests (Rust stable, all features)	1m 37s
tests (Rust stable, no features)	1m 19s
tests (Rust stable, no features)	1m 19s
rs-semver-checks / Rust semver-checks 🦀	3m 43s
rs-semver-checks / Rust semver-checks 🦀	2m 29s
Check standard extensions	4s
Check standard extensions	4s
Required checks 🦀	1s
Required checks 🦀	1s
	2h 0m 49s

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