New js utility API for decoding error

[matteo-cristino]

Add a utility function called decode_error that parse the zencode logs and return only the real errors, i.e. the strings that starts with a [!] both in logs and in the J64 TRACE. Example of usage

import {zencode_exec, decode_error} from 'zenroom'

zencode_exec(scripts, {}).catch(decode_error);
// same as
let result
try {
    result = await zencode_exec(script, {})
} catch(
    decode_error(result)
}

In both cases the error should be printed to console.error and also returned.

Right @puria ?

[puria]

I would keep the same behavior of zencode_exec, does that console.lo/error automatically? I don't remember, if yes then also decode_error should

[matteo-cristino]

no, it does not print anything. Then it will just return the string containing the clear error

[jaromil]

I understand this belongs to the js wrapper shipped with npm. It is good to have, hoping it can be done without adding dependencies to the npm package, where we proudly have zero.