Replace SQLite with MongoDB

[JoeBatt1989]

Is your feature request related to a problem? Please describe.
To harmonise MIG with MWM and MTM, it would be beneficial to move IG DB to use Mongo. This would be used for Export Destinations, AET, Sources etc

Describe the solution you'd like
Use of Mongo for state in MIG rather than SQLite

[github-actions]

🎉 This issue has been resolved in version 0.3.4 🎉

The release is available on:

• GitHub Release