feat: return explicit execute errors

[sebastiendan]

Description

This PR improves error handling in the execute processor. New errors are typed following an enum listing all errors potentially being thrown during the execute processor execution, and transaction revert error data is decoded if revert happened in ToposMessaging code (otherwise throws the raw data, to be decoded by the client).

Fixes TOO-423

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works