Claims integration with FLAN

[timvandenhof]

Describe the feature

It would be cool to have claims made via FLAN (https://github.com/Flemmli97/Flan) shown as a layer on the map as well.

If you configure FLAN to write the configuration to the filesystem as JSON files, that might be the easiest way to read th claims. Claims are stored per user and per dimension and admin claims are in a separate file.

Requires that #7 is picked up first.

Why?

• Griefprevention is not available for Fabric
• WorldGuard is not available for Fabric
• ClaimChunk is not available for Fabric

Suggestions:

• Display name of the claim
• Display owner of the claim
• Separate layer for admin vs user claims
• Maybe only when 'flan:can_stay' is True on the plot, so that users have the option to not make their plot visible on the map

Other

No response