Syncthing support

[KylePiira]

It would be great to have the option to use Syncthing to synchronize notes across devices instead of cloud services. Since Syncthing can sync anything that can be represented as a file on the file system, I believe it could be done with the following two changes:

• Add the ability to set an arbitrary database location on disk
• Automatically scan for changes to the local database files periodically and when opening the app

[Schoebi]

I perceive this service as an enhancement of "davdroid" and "open tasks".

Why not collaborate with that team?

[johnmmcgee]

This would be great. An extra option outside of Nextcloud would be fantastic.