feat: improved error message on contract calls

[enitrat]

Feature Request

Describe the Feature Request

Currently, testing contract interoperability can fail with the ENTRYPOINT_FAILED error when anything fails in the entrypoint.
It makes it really hard to find the actual cause of the error.
Describe Preferred Solution

It would be great if the error message returned was actually the one specified in the contract. For example, if my contract panics with a panic_with_felt252('not implemented') error, it should return not implemented.

Describe Alternatives

Related Code

Additional Context

If the feature request is approved, would you be willing to submit a PR?
(Help can be provided if you need assistance submitting a PR)

• Yes
• No