Add location field/metadata for manually setting the intended vault location

[tobihagemann]

Please agree to the following

• I have searched existing issues for duplicates
• I agree to follow this project's Code of Conduct

Summary

I'd like to let the users know where they can expect the vault to be located.

Motivation

Since the vault template can be located anywhere, it would be great if users can at least be informed where the vault can be expected.

Considered Alternatives

The description field could be used for that but a dedicated location field could improve usability and the location information can be shown differently.

Anything else?

Maybe an admin should be able to manage preset locations so that users can choose sensible defaults.