Add IndexedDB parser

[rgayon]

Context : https://www.amnesty.org/en/latest/research/2021/07/forensic-methodology-report-how-to-catch-nso-groups-pegasus/#_ftn1

From https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API/Using_IndexedDB : IndexedDB is a way for you to persistently store data inside a user's browser. Because it lets you create web applications with rich query abilities regardless of network availability, your applications can work both online and offline.