Better multi fetch of txs in cron. Background check of new transactions (wip). Fix wrong decrypt of wallets

Add prettier config file + recommended extension

See merge request !53

None

See merge request !52

Currently translated at 100.0% (232 of 232 strings)

Translation: Ğ1nkgo/g1nkgo
Translate-URL: https://weblate.duniter.org/projects/g1nkgo/g1nkgo/fr/

Translation + update packages + linter

See merge request !51

None

See merge request !50

Currently translated at 100.0% (232 of 232 strings)

Translation: Ğ1nkgo/g1nkgo
Translate-URL: https://weblate.duniter.org/projects/g1nkgo/g1nkgo/gl/