Utilize thiserror and anyhow for Error handling

[LimpidCrypto]

Utilize modern error handling:

thiserror: https://docs.rs/thiserror/latest/thiserror/ https://crates.io/crates/thiserror/1.0.24

anyhow: https://docs.rs/anyhow/latest/anyhow/ https://crates.io/crates/anyhow

This has to be implemented for existing errors and has to be done for all future errors

[LimpidCrypto]

We already have utilized anyhow and thiserror for the models. We still have to utilize them for core, utils and wallet.