Updated inv-mod to be consistent with existing u256-inv-mod impl. (#8584

)

Updated `Split` concept to allow more efficient Byte reads. (#8555)

Cherry pick const folding fix. (#8454)

Version bump and cairo-vm bump for dev release.

Bumped version to v2.12.3.

Updated versions of cairo-vm and starknet-types-core crates.

Fix usage for `let else` statements. (#8209)

Bumped version to 2.12.0. (#8068)

Stopped updating snap-refs - and only introducing top level. (#8048)

Cherry picks (#8009)