Improve and standardise logging and error handling in vc-libs

[hugoib]

On the wallet app, we stablished a good approach to handle errors and logging. Also to bring the errors to the user fe. Review if there are improvements that could be done there or if there is not, implement an example on the wallet-vc-libs to establish a format.

On the wallet app it required a refactor so if we implement it now before building more protocols and parts, will be better.