Improve version error message with details

[isagi-y22]

Enhances VersionError in program.rs to display both received and expected version numbers, making version mismatch issues immediately clear.

Before: Unsupported Sierra program version
After: Unsupported Sierra program version: got 2, expected 1

[reviewable-StarkWare]

This change is 

[orizi]

Reviewable status: 0 of 1 files reviewed, 1 unresolved discussion (waiting on @isagi-y22)

---

crates/cairo-lang-sierra/src/program.rs line 42 at r1 (raw file):

#[derive(Debug, Error)]
#[error("Unsupported Sierra program version: got {got}, expected {expected}")]
struct VersionError {

these are already clear enough - and the caller might not expect this change.
Close PR.

[orizi]

No response.

Closing.